Invited Speakers

Following receiving his Ph.D. in Electrical Engineering from Johns Hopkins University in 1993, Greg Sun joined the faculty at the University of Massachusetts Boston where he is currently a professor of Electrical Engineering. He led the effort in establishing the first publicly supported Engineering Program in the City of Boston, serving as the founding Chair of the Engineering Department at UMass Boston. His research interests are in semiconductor optoelectronics, silicon photonics, and nano-plasmonics. He has published over 170 papers in refereed journals and book chapters, delivered over 160 invited and contributed conference talks, and given over 50 seminars and colloquia. He is a fellow of Optica, formally Optical Society of America and of American Physical Society (APS). He is now a deputy editor for Journal of Lightwave Technology.

Silicon-based photonic devices such as emitters and detectors have long been desired owing to the possibility of monolithic integration of photonics with high-speed Si electronics and the aspiration of broadening the reach of Si technology by expanding its functionalities well beyond electronics. To overcome the intrinsic problem of bandgap indirectness in the group-IV semiconductors of Si, Ge, and SiGe alloys, a new group-IV material platform silicon-germanium-tin alloy (SiGeSn) emerged as a promising material system, featuring compatibility with current CMOS process, capability of monolithic integration on Si, and the tunable bandgap allowing the optoelectronic devices operation covers broad wavelength in near- and mid-infrared ranges. In this talk, I shall present the development in photonic devices based on such a group-IV material system including photodetectors, LEDs, and lasers covering the wide spectrum of mid-IR to far-IR/THz in the last two decades.

Satoshi Ishii has been the Team Leader of Optical Nanostructure Team at NIMS since 2023. In 2012, he completed his PhD in Electrical and Information Engineering at Purdue University. After being a JSPS Overseas Special Research Fellow and a researcher at the National Institute of Information and Communications Technology (NICT), he has been working at NIMS since 2014 as a tenured researcher. His specialties are nano-optics and radiative heat transfer. One of his achievements is displayed in TEPIA Advanced Technology Gallery, a facility located in Tokyo, Japan, that showcases cutting-edge technology.

In radiative heat transfer, the blackbody radiation sets a strict upper limit at a given temperature. During the past few decades, numerous attempts have been made to go beyond blackbody radiation, including near-field thermal radiation and Mie resonance. However, they are not scalable owing to their enhancement mechanisms. In the current talk, we present our recent attempts to enhance thermal radiation using scalable nanophotonic structures. In the first part, we show that nitride multilayers can drastically enhance thermal radiation propagating inside due to hyperbolic phonon polaritons. In the second part, micron-scale pyramid structures are beneficial in extracting thermal radiation from high-refractive-index materials to the ambient.

Prof. Yi-Ping Wang is with the Graduate Institute of Advanced Semiconductor Technology at National Taiwan University of Science and Technology. He also serves as a Distinguished Researcher at the Electronic and Optoelectronic System Research Laboratories (EOSL) of ITRI and the Photonics Industry & Technology Development Association (PIDA). His research interests include Micro-LEDs, quantum dots, two-dimensional materials, hydrogen–ammonia energy materials, and reliability analysis of optoelectronic devices. He actively contributes to industrial technology advancement and supports government agencies in policy formulation. He has also served as a review committee member for projects commissioned by ITRI, the Ministry of Economic Affairs (MOEA), and the Industrial Development Administration (IDA).

Carrier dynamics and thermal degradation behaviors of quantum dots (QDs) and K₂SiF₆:Mn⁴⁺ (KSF) phosphors, employed in full-color micro-LED displays, are examined to gain deeper insight into their performance under operational stress.Temperature-dependent photoluminescence spectroscopy, conducted over a range of 77K to 400K, is used to evaluate emission efficiency, carrier lifetimes, and thermal quenching characteristics under high excitation conditions.The results reveal distinct degradation mechanisms and highlight notable differences in thermal stability between QDs and KSF.These findings are essential for the selection and optimization of color conversion materials, contributing to improved performance and long-term reliability in next-generation micro-LED display technologies.Furthermore, understanding these mechanisms provides a solid foundation for the development of optical nano-devices tailored for advanced photonic applications, including high-resolution displays, optical communication modules, and silicon photonics systems.

Hansuek Lee is Associate Professor in Department of Physics at KAIST. He received his Ph.D. degree in electrical engineering from Seoul National University in 2008. From 2008 to 2015, he worked as postdoctoral scholar, research staff, and visiting associate at California Institute of Technology (Caltech), Pasadena, CA. His research focuses on various nonlinear and quantum phenomena from visible to mid-IR wavelength range boosted by ultra-high-Q resonators and low loss waveguides on a chip.

The mid infrared (mid IR) hosts fundamental molecular vibrations, enabling sensing, imaging, time resolved spectroscopy, and photochemical processing. Chalcogenide glasses (ChGs) are ideal mid IR platforms thanks to wide transparency and strong nonlinearity, yet on chip losses have long exceeded those of fibers. We report on chip ChG resonators with Q-factor exceeding 6×10^7—over 60× higher than prior mid IR records—and optical loss of 0.29 dB/m, matching ChG fibers and reaching the material absorption limit. These ultralow loss devices reveal distinct absorption bands from residual impurities, emphasizing impurity control for further progress. Leveraging the high Q-factor and lithographic control of free spectral range, we demonstrate the first mid IR Brillouin laser, with 0.1 mW threshold and an 85 Hz Schawlow–Townes linewidth, outperforming commercial quantum cascade lasers. We also present supercontinuum dispersive wave generation at target wavelengths for molecular sensing in the mid-IR based on this low loss on-chip ChG waveguide platform.

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Lian-Kuan Chen received his bachelor’s and Ph.D. degrees from National Taiwan University and Columbia University, respectively. He is currently a Professor of the Department of Information Engineering at the Chinese University of Hong Kong. He has served as the Department Chairman (2004-2006) and the Director of the Centre for Advanced Research in Photonics (2010-2014). He was an associate editor of IEEE Photonics Technology Letters (2005-2011) and OSA/IEEE Journal of Optical Communications and Networking (2012-2015).  His research interests include underwater and water-air optical wireless communications, visible light communication, DSP for transmission systems, broadband local access networks, optical performance monitoring, and bio-photonics.

With the rapid advancement of deep-sea mining, it is a significant concern to both environmental protection organizations and mining entities regarding how to monitor the status of the benthic environment and the mining process.The mining process inevitably induces suspended particles that form the plume. The plume can significantly impact optical wireless communication, resulting in broken communication links. In this paper, we introduce a novel mobile TDM-PON system that enables stationary and mobile monitoring devices to be networked and communicate with the surface control ship under the influence of the plume. The system is constructed using commercial 1-Gb/s TDM-PON components, and the network is reengineered to accommodate mobile ONUs via laser beam tracking, forming a wireless TDM-PON. Plume mitigation is achieved automatically through mobile ONUs to reroute in the TDM-PON system. Experimental results are presented to validate the system's performance.

Prof. You-Chia Chang is currently an Associate Professor at National Yang Ming Chiao Tung University. He received his Ph.D. in Applied Physics at University of Michigan in 2016. From 2016 to 2018, he served as a postdoctoral research scientist in the Department of Electrical Engineering at Columbia University. He joined the faculty of Department of Photonics at National Yang Ming Chiao Tung University in 2018. Prof. Chang is a recipient of the Jade Mountain (Yushan) Young Scholar Award (2018 and 2023) and NSTC FutureTech Award (2021 and 2023). Prof. Chang’s research interests include silicon photonics, metasurfaces, and metamaterials.

Silicon photonics has enabled chip-scale devices capable of delivering free-space beams for the detection and manipulation of external objects. Key applications include LiDAR, free-space optical communication (FSO), and trapped-ion quantum computing. In the first part of this talk, I will present beam shaping using metasurfaces monolithically integrated with silicon photonic integrated circuits. We experimentally demonstrate diffraction-limited beam focusing and holographic image projection above the silicon photonic chip. Our demonstrations span both the telecommunication wavelength range using the Si platform and the visible wavelength range using the SiN platform. In the second part, I will discuss a resolution-enhanced silicon photonic beam steerer. We increase the number of resolvable points by combining coarse steering with a metalens focal plane array and fine-tuning with thermal prisms. We experimentally demonstrate a 2D beam steerer with enhanced resolution, achieving 39 resolvable points using 13 waveguide channels and a field of view of 51°.

20 years of experience on RF components testing, High-Speed Digital Validation, and Optical Communication. Drive business development and market strategy for AI-related interconnect solutions for Keysight Technologies.

As the demand for high-performance computing and AI workloads surges, traditional monolithic architectures are giving way to heterogeneous integration. This session explores the critical verification challenges inherent in Chiplet ecosystems and Co-Packaged Optics (CPO). We will discuss advanced test strategies and measurement techniques designed to address signal integrity, thermal management, and interoperability, ensuring the reliability and performance of these complex next-generation systems.

Chao-Hsin Wu received the B.S. and M.S. degree in Electrical Engineering from the National Taiwan University and received the Ph.D. degree from the University of Illinois at Urbana-Champaign. He is currently the professor and Director of the Graduate Institute of Electronics Engineering at NTU. His current research at NTU includes advanced semiconductor lasers (VCSELs and DFBs), GaN power and RF electronics, Si photonics, photonic integrated circuits, micro-LEDs, and 2D materials microelectronics. He has published more than 130 journal papers and 150 conference papers. Dr. Wu is a Fellow of the OPTICA and a member of the IEEE and SPIE. He serves as the Chair of the Photonic Society Taipei Chapter of IEEE since 2025.

As digital demands surge, the quest for faster data communication intensifies, positioning Vertical-Cavity Surface-Emitting Lasers (VCSELs) as key enablers in optical interconnects. This presentation illuminates the advancements in high-speed VCSEL technology, particularly focusing on oxide-confined VCSELs, renowned for their superior modulation speeds and efficiency. Beginning with an overview of VCSEL technology and its advantages, we delve into its pivotal applications in data centers, active optical cables, and support for Generative AI, highlighting the transformative impact of recent innovations. We explore contributions from industry leaders and academia, showcasing breakthroughs that enhance VCSEL performance and address the bandwidth needs of next-generation technologies. The discussion extends to the challenges and future directions for VCSEL technology, aiming to spark a dialogue on overcoming obstacles and fostering further advancements. This talk not only sheds light on the significance of high-speed VCSELs in modern optical communications but also sets the stage for future innovations in the field.

As a passionate researcher, educator, trainer, consultant, and Professional Engineer of material science and engineering for more than twenty-eight years, Kuan Yew CHEONG is a full Professor at the School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia (USM), Malaysia. Prof. Cheong served as a Commissioned Senior Scientist at Korea Electrotechnology Research Institute (2004, 2006), Adjunct Associate Professor at Multimedia University, Malaysia (2012), Visiting Lecturer at Universiti Malaysia Perlis, Malaysia (2012), Visiting Professor at National Taiwan University (2018), Visiting Professor at MIMOS Semiconductor Sdn Bhd (2018), Technical Advisor for NTG Innovation Pte. Ltd., Singapore (January – December 2019), affiliated to Innovation Centre for Clean Water and Sustainable Energy (WISE), National Tsing Hua University, Taiwan (November 2018 to October 2021), Editor of “Materials Science in Semiconductor Processing”, Elsevier (2015 – June 2021), Visiting Professor at the State Key Laboratory of Crystal Materials, Institute of Novel Semiconductor Materials, Shandong University, China (Jan 2022 – Dec 2023), and External Examiner for Xiamen University Malaysia (Undergraduate, MSc, and PhD in New Energy Science and Engineering Program) (February 2025 – January 2026). Currently, he is a Technical Consultant of failure analysis for MIMOS Services Sdn Bhd (Malaysia), Editor-in-Chief for “Materials Science in Semiconductor Processing”, Elsevier (since July 2021), Editor-in-Chief for “Journal of Minerals and Materials Engineering”, USM (since March 2022), Editorial Advisory Board Member of Book Series: “Vacuum and Thin Film Deposition Technologies” (Elsevier) (since 15 April 2024), and Distinguished Lecturer of IEEE Electronic Packaging Society, USA (01 Jan 2024 – 31 Dec 2027). He has published more than 250 high impact-factor journals, 6 reputable book chapters, 5 edited books, and 1 granted Malaysian Patent (MY-153033-A), which align to his research direction of solving environmental and energy related issues through the development of advanced dielectrics for surface passivation and modification of wide bandgap semiconductor devices and of natural organic materials for sustainable electronic devices. His research philosophy was featured in a documentary in a paid channel TV, ASTRO AEC (“Stay Hungry Stay Foolish”). As one of the Top 2% for Citation Impact (Applied Physics, Materials) in Single Year 2022 and 2023 by Stanford University, a registered Professional Engineer (Board of Engineers, Malaysia), a “Top Research Scientists Malaysia (TRSM)” (Academy of Sciences Malaysia), and an Accredited and Certified Professional Trainer (HRD Corp., Malaysia), Prof. Cheong has delivered more than 500 technical training courses (https://shorturl.at/RNiA2) to various local and multinational industries and resolved many challenging industrial cases related to processing and reliability of electronic materials both wafer and package levels. Currently, Prof. Cheong is a Fellow of The Institution of Engineers Malaysia (IEM), Senior Member of Institute of Electrical, Electronic Engineers (IEEE), a Distinguished Lecturer of IEEE Electronic Packaging Society (EPS), a Principal Interviewer for Professional Interview of IEM, Senior Evaluation Panel of Engineering Program Accreditation under Engineering Accreditation Council, Malaysia, and Founding Chairman of Material Engineering Technical Division under IEM.

Ultrathin (< 100-um thick) Si-based power devices serve multiple advantages in enhancing its performance with the trade-off of its mechanical properties. To solve issues of handling, dicing, wire interconnection, and other packaging assembly processes of ultrathin die, backside metallization layer is deposited on the die for stabilization purpose mainly to prevent warpage of the wafer. Cu is a good candidate for die backside layer due to its suitable elastic modulus, low electrical resistivity, high thermal conductivity, and low coefficient of thermal expansion mismatch with Si and other packaging materials. However, dicing of ultrathin Si wafers with a backside Cu layer simultaneously is challenging. As the wafer thickness decreases to below 100 μm, conventional mechanical blade dicing tends to cause severe damage to the singulated dies. Of available dicing technologies, laser dicing is an acceptable and feasible method to resolve this challenge. In this work, the side-wall quality of diced region by nanosecond, picosecond, and femtosecond laser dicing is compared and correlated to the die strength. The die strength was measured after removal of the backside metallization by three-point bending test and the fractured region was analyzed by scanning and transmission electron microscopy.

The B. S. degree was received with the first prize (rank the 1st place in a class of 106 students) in 1990 from NCTU, Hsinchu, Taiwan, in electronics engineering. The Ph. D. degree was received at the Institute of Electronics, National Chiao Tung University in 1994. From 2011 to 2013, Professor Chen took over the Chair of Department of Electrophysics of National Chiao Tung University (NCTU). From 2017 to 2021, he served as the Dean of College of Science of NCTU. Since February 2021, Prof. Chen starts to serve as Senior Vice President of National Yang Ming Chiao Tung University.

The significance in coherent optical resonators analogous to quantum systems originates from an important fact that the theoretical formula for elucidating the spatial and temporal characteristics of laser modes is mathematically analogous to those for quantum coherent states. This analogy has attracted wide interests to exploit the optical laser resonators to explore a variety of high-order quantum wave functions. Inversely, the quantum theory has been employed to provide deep insights into the formations of structured laser modes. The generations and investigations of structured laser modes pave a prospective way for exploring the continuous transition from quantum to classical worlds. Since 2000, my research group has started to design a variety of optical resonators for developing an experimental platform to explore the riches of the structured laser modes. These structured laser modes have been confirmed to be excellent optical simulations of quantum coherent states.

Keith Chen received his master’s degree in physics from Tamkang University, Taipei, in 2013. He is currently an Application Engineer at Keysight Technologies Taiwan. His previous experience includes technical support roles at Synopsys Taiwan and Cybernet System Taiwan, specializing in photonic simulation and optical design software.

隨著量子計算技術的快速發展，光學元件設計在其中扮演越來越關鍵的角色。無論是用於資訊傳遞、邏輯運算，或是光-物質介面的量子操作，這些應用都需要精準控制與模擬光子的行為。本次分享將介紹如何運用 RSoft 光子元件工具，進行與量子計算相關的光子元件之設計與分析。從概念驗證、光場分佈觀察，到模態特性與干涉行為探討，我們將展示光子元件工具在新興量子光子應用中的潛力與可能性。

As quantum computing continues to advance, the role of photonic components in enabling scalable architectures is becoming increasingly significant. Whether used for quantum communication, logic operations, or light-matter interactions, these emerging applications demand precise optical design and analysis. In this talk, we will explore how RSoft tools can be applied to the conceptual design and simulation of photonic structures relevant to quantum computing. From mode analysis and field distribution to quantum-inspired interference behavior, we’ll highlight the potential of RSoft in supporting innovative photonic device development in the quantum domain.

Tomoyoshi Shimobaba completed his PhD at Chiba University, Japan. Following his PhD, he served as a special postdoctoral researcher at RIKEN. From 2005 to 2009, he was an Associate Professor at the Graduate School of Science and Engineering, Yamagata University, Japan. Subsequently, from 2009 to 2019, he was an Associate Professor in the Graduate School of Engineering, Chiba University. He is currently a Professor in the Graduate School of Engineering, Chiba University. He has published over 200 papers in reputable journals and currently serves as an Associate Editor for Optics Letters, Scientific Reports, and IET Image Processing.

Holographic displays provide immersive 3D viewing but face challenges in 3D data acquisition, hologram generation, and data volume. This study introduces novel hologram generation methods using Neural Radiance Fields (NeRF) and 3D Gaussian Splatting, enabling direct hologram prediction from synthesized views without specialized 3D cameras. We also propose generating binocular hologram pairs from single monocular images using deep neural networks, reducing hardware costs. Furthermore, a holographic signal converter transforms conventional 2D video signals from existing devices (e.g., game consoles, TVs) into 3D holographic signals in real time. Finally, a deep-learning–based hologram compression technique is introduced to efficiently reduce data size.

Vera Marinova is a full professor at the Institute of Optical Materials and Technologies, Bulgarian Academy of Sciences. She received MSc (Optics and Spectroscopy) from Sofia University and PhD degree in 2000. She joined Photonics Department, National Yang Ming Chiao Tung University, Taiwan (NYCU) as post-doctoral researcher (2000-2004). Since 2014, Marinova become visiting professor at Electrophysics Department, NYCU, Taiwan where currently she is Adjunct Professor. Marinova leads a group on synthesis of 2D materials for application in optics and photonics (liquid crystal displays, spatial light modulators, flat optical elements). She is a Fellow of the SPIE, OPTICA, MRS and E-MRS.

This presentation will provide a comprehensive overview of the current landscape of 2D nanomaterials for opto-electronic and photonic integration. Conventional silicon photonics, being a cornerstone of modern data communications, faces many challenges such as light emission, active modulation and broadband responsivity due to the material's indirect bandgap and limited optical properties. 2D materials, with their dangling-bond-free surfaces and extraordinary electrical and optical properties, demonstarte a powerful solution. Their ability to be integrated directly onto existing silicon photonic platforms via van der Waals forces allows a paradigm shift in device design, enabling a new class of compact and energy-efficient components. We will discuss the remaining challenges such as large-scale, defect-free synthesis and long-term stability of performed devices. A major focus will be creating van der Waals heterostructures by stacking different 2D materials, which allows precise energy band alignment and light-matter interactions. We will present integration into waveguides and share future outlook.

Tsung-Xian Lee is a Professor at the Graduate Institute of Color and Illumination Technology at National Taiwan University of Science and Technology (NTUST). His research spans optical design, color science, illumination engineering, and AR/MR display systems. He leads a research group focusing on advanced optical system design, solid-state lighting, and smart spectral-sensing technologies. His team integrates imaging and non-imaging optics with ray-tracing, wave-optics modeling, AI, and human-factor approaches to develop next-generation optical solutions. Prof. Lee is also actively engaged in industry collaborations and contributes to the activities of CIE-Taiwan.

The integrated simulation framework provides a reliable tool for VHOE-based AR waveguides, combining geometric and diffractive modeling for accurate performance evaluation and efficient design. Its applications in color control, vision correction, and eyebox uniformity highlight its potential to address critical AR optics challenges and enable more practical AR display solutions.

Chien-Chung Lin received the B.S. degree in electrical engineering from the National Taiwan University, and the M.S. and Ph.D. degrees in electrical engineering from Stanford University, Stanford. Starting August, 2021, he joined Graduate Institute of Photonics and Optoelectronics, Department of Electrical Engineering, National Taiwan University. From 2009 to 2021, he was with National Chiao Tung University (NCTU), where he holds a position as a Professor. The major research efforts in his group are in design and fabrication of novel optoelectronic devices, including LEDs, solar cells, and lasers. Before joining NCTU, he worked for different start-ups in the United States, including E2O Communications Inc., and Santur Corporation. He has more than 230 journal and conference publications and is a Fellow of the OPTICA (formerly the Optical Society of America) and a senior member of the IEEE Electron Devices Society and Photonics Society.

The full-color microdisplay is a potential candidate for the next generation of information displays. To meet the requirements for high-definition and high-quality pictures and animations, the size of the pixels on the display must be reduced. However, the reduced size typically leads to a degradation in the pixel’s quantum efficiency. By utilizing semiconductor-grade fabrication techniques, we can achieve an ultra-high pixel density (higher than 5000 pixels per inch) in a color conversion layer based on colloidal quantum dots (CQDs). If an additional optical mirror can be added to the display, the recycling of excitation photons can enhance CQD photon extraction. In this talk, a highly efficient (with a color conversion efficiency exceeding 50%) scheme for dispensing CQDs will be reviewed and analyzed.

Hui-Hsin Hsiao received her B.S. degree in Physics and Ph.D. degree from the Graduate Institute of Photonics and Optoelectronics (GIPO) at National Taiwan University (NTU), Taiwan, in 2007 and 2013, respectively. From 2015 to 2016, she was a postdoctoral researcher at the Institute of Theoretical Solid State Physics, Karlsruhe Institute of Technology, Germany. In 2018, she joined the faculty of the Institute of Electro-Optical Engineering at National Taiwan Normal University (NTNU). In 2022, she became an associate professor in the Department of Engineering Science and Ocean Engineering at NTU. Since 2025, she has also held a joint appointment with GIPO. Her research interests include linear and nonlinear plasmonics, nanophotonics, mid-infrared thermal emitters, metamaterials and metasurfaces, and optoelectronic devices. She was awarded the Youth Photonics Award of Taiwan Photonics Society in 2022 and was selected as a recipient of National Science and Technology Council (NSTC) Outstanding Young Scholar Research Grant in 2024.

We have developed a series of all-dielectric metasurfaces to excite toroidal dipole or quasi-bound states in the continuum (quasi-BIC) modes for refractive index sensing. Meanwhile, the strong light-matter interaction within dielectric nanocavities, along with their high laser damage threshold, makes them highly suitable for nonlinear optical applications. For example, the interference of the multipolar resonant modes in dielectric metasurfaces was employed to achieve the generalized Kerker condition for efficient third-harmonic generation. The effects of the array size and oblique light incidence on THG performance, mediated by collective quasi-BIC modes, were investigated. Recently, to broaden the spectral range of nonlinear response, we also employed strong coupling between Mie resonance, quasi-BICs, and epsilon-near-zero mode in ultrathin Indium-Tin-Oxide film and achieve a ultrabroadband THG enhancement in the near-infrared. These nonlinear all-dielectric metasurfaces can be realized by complementary metal-oxide-semiconductor compatible process and are promising for on-chip integration in advanced nonlinear photonic applications.

Haruhisa Soda has completed his PhD from Tokyo Institute of Technology, Japan in 1983. He is the Account Manager, Flexcompute.

Tidy3D is a software package for solving extremely large electrodynamics problems using the finite-difference time-domain (FDTD) method.

It can handle large-scale simulations with exceptional performance and usability through the browser or Python API without compromising accuracy. It can be controlled through either an open source python package or a web-based graphical user interface.This python API allows you to:

• Programmatically define FDTD simulations.

• Submit and manage simulations running on Flexcompute’s GPU servers.

• Download and postprocess the results from the simulations.

Our platform is a next-genreration photonic design automation platform that consolidates the entire Photonic Integrated Circuits development workflow.

ByungKun Lee is an Assistant Professor at the Daegu-Gyeongbuk Institute of Science and Technology.Prof. Lee received his SB, MEng, and PhD degrees at the Massachusetts Institute of Technology. His doctoral thesis focused on optical coherence tomography techniques for quantitative measurement of total retinal blood flow and high-speed ultrahigh-resolution imaging of the outer retina, under Prof. James G. Fujimoto’s supervision. Before joining DGIST, Prof. Lee has worked with Prof. Wang-Yuhl Oh at KAIST as a postdoctoral research associate.Prof. Lee’s current research interest lies in developing imaging systems, scan patterns, image processing algorithms, and generative neural networks for in vivo imaging of retinal cells using multi-MHz phase-stable swept-source OCT.

Three-dimensional (3D) cellular-resolution imaging of the human retina could revolutionize ophthalmology, revealing pathogenic mechanisms and biomarkers for early diagnosis. However, existing approaches have limited practical utility due to their restricted imaging fields, high cost, and inherent hardware complexity. Here, we demonstrate 3D depth-invariant cellular-resolution imaging of the living human retina over a 3-mm × 3-mm field of view using the intrinsically phase-stable multi-MHz retinal swept-source OCT and 3D k-space image processing methods. Single-acquisition imaging of photoreceptor cells, retinal nerve fiber layer, and retinal capillaries is presented across unprecedented imaging fields. The application of the AdamW optimizer to a singular-value-based image sharpness metric enabled quick and accurate estimation of aberration profile. By providing rapidly processed wide-field 3D cellular-resolution imaging in the human retina using a standard point-scan architecture routinely used in the clinic, this platform proposes a strategy for expanded utilization of high-resolution retinal imaging in both research and clinical settings.

Dr. Shu Jia is an Associate Professor in the Wallace H. Coulter Department of Biomedical Engineering at Georgia Institute of Technology and Emory University. He received his BS with Professor Yi-Dong Huang at Tsinghua University, his Ph.D. with Professor Jason Fleischer at Princeton University, and postdoctoral training with Professor Xiaowei Zhuang at Harvard University. Dr. Jia has received the NSF CAREER Award, DARPA Young Faculty Award, and NIH MIRA Award, among others.

The intricate visualization of diverse anatomical and functional traits within densely packed cellular environments and across extensive heterogeneous populations reveals essential insights into the fundamental principles governing living organisms. In this presentation, I will elucidate the advanced light-field and super-resolution microscopy techniques recently developed by my laboratory. These techniques are specifically designed for the high spatiotemporal resolution and accessibility required for comprehensive cellular system studies.

Wei-Chuan Shih is Cullen Engineering Professor of Electrical and Computer Engineering at the University of Houston (UH). He earned his Ph.D. from MIT Spectroscopy Lab under late Prof. Michael S. Feld. He received MIT Martin Fellowship, NSF CAREER Award, and NASA Early CAREER Faculty Award. He is a Fellow of SPIE, and serves as Associate Editor for Optics Express and Journal of Nanophotonics. His research focus is on exosome-based cancer diagnostics. Dr. Shih has started multiple companies based on his technologies. Most recently, he co-founded Seek Diagnostics to commercialize streamlined exosome isolation and nanobiophotonic liquid biopsy technology.

Extracellular vesicles (EVs) have emerged as potential biomarkers for diagnosing a range of diseases without invasive procedures. EVs also offer advantages compared to synthetic vesicles for delivery of various drugs; however, limitations in isolating EVs from other particles and soluble proteins have led to inconsistent EV retrieval rates with low levels of purity. Once EVs are isolated, however, another challenge emerges regarding how to detect and profile their molecular constituents at single EV level. Existing approach of EV analysis has been limited to “bulk” analysis. That is, most data are obtained from a population. Such a bulk analysis approach not only prevents the assessment of heterogeneities among individual exosomes, but also reduces sensitivity to detect subtle differences between diseased and normal exosomes. In this talk, I will discuss our approaches using size-exclusion fast protein liquid chromatography (FPLC) and plasmonic nano-aperture label free imaging (PANORAMA) and fluorescence microscopy to address these two issues, respectively.

He received his Ph. D from the Department of Biomedical Engineering at the UC Irvine. He also worked at the Beckman Institute for Advanced Science and Technology at UIUC. He is currently a full professor in Biomedical Engineering at UNIST and the Vice President of the Optical Society of Korea. His research interest is to develop new optical technologies that address challenges in clinical medicine and basic biological research. He developed a successful optical platform for in vivo translational research, and has published more than 100 peer-reviewed journal papers in the field of biophotoics.

Histological optical imaging is the gold standard for examining biological tissues, involving a labor-intensive process of dissection, sectioning, staining, and interpretation. While widely used in pathology, it has limitations in speed and throughput. Recent advancements in optical imaging technologies have enabled high-resolution, non-invasive imaging with new contrast mechanisms beyond traditional chemical staining. Despite this progress, challenges remain in acquiring high-throughput, large-volume anatomical data due to light scattering, which limits imaging depth and resolution. This presentation introduces a novel, staining-free, multi-scale imaging modality that leverages scattering and phase contrast for efficient tissue visualization. It emphasizes the potential of optical staining as a fast, robust alternative for histopathology. Additionally, it discusses cutting-edge developments in large-scale imaging using optical coherence microscopy and quantitative phase imaging, along with AI-driven approaches like virtual staining and resolution enhancement.

Hoang Yan Lin has completed his PhD from Department of Electrical Engineering, National Taiwan University, and postdoctoral researches from Academia Sinica, Taiwan. He has been the senior researcher and section manager in Industrial Technology and Research Institute, Hsinchu, Taiwan. He is the Professor of Graduate Institute of Photonics and Optoelectronics, and Department of Electrical Engineering, National Taiwan University, Taipei, Taiwan. He has been the Chairman of 3DIDA and is the member of SID, Optica, SPIE, and 3DIDA.

For the next generation smart cockpits, head-up displays (HUD) are the advanced technologies to provide a safer way for the drivers’ vision. Head-up display is the augmented reality (AR) display technology and panoramic HUD will be the ultimate one to potentially provide a 360-degree vision for the drivers so that they can have a safer and better way to control the smart cockpits. Holographic projection or light-field display technologies are the important 3D technologies that can provide multi- or varying-depth advanced driver assistance system (ADAS) information to the drivers. In this presentation, we propose a panoramic HUD based on holographic projection and light-field display technologies to form a full 180-degree display for the 360-degree vision. It can also be demonstrated as a high efficiency and compact AR display system by employing the waveguide technology. Real-time generation and display of the holographic and light-field images will also be discussed.

Zero Hung received his B.S. and M.S. degrees in Chemical Engineering from National Tsing Hua University, Taiwan. He is currently with Applied Materials, where he focuses on the development of high mobility oxide (HMO) technologies to enable next-generation display backplanes. His research encompasses the evaluation of novel HMO materials and the co-optimization of device, process, and equipment integration to enhance device performance and reliability. Prior to this, he was with Apple Inc., where he led the successful mass production of oxide TFTs—particularly IGZO and HMO—for advanced display applications. He began his work on OLED and oxide TFTs at AUO, contributing to the early-stage development of oxide backplane technologies since 2008. He has authored over 20 peer-reviewed publications with over 1,000 citations, holds multiple patents, and actively collaborates with academic and industry partners to advance innovation in oxide semiconductor devices.

OLED displays are rapidly expanding from mobile devices to IT applications. While LTPO has become the mainstream backplane technology for Gen6 OLEDs, its implementation in Gen8+ OLEDs faces significant cost and investment challenges. High mobility oxide (HMO) has emerged as a compelling low-cost alternative, offering superior performance and reliability compared to a-Si, with comparable cost and demonstrated Cu integration in Gen8+ LCD mass production. However, for OLED applications and as a potential LTPS replacement, HMO still faces challenges such as material maturity and the mobility–reliability trade-off. Applied Materials’ Integrated Materials Solutions (IMS) team tackles these issues by developing next-generation equipment in close collaboration with material suppliers, enabling co-optimization across device, process, and equipment. This holistic approach aims to accelerate the mass adoption of HMO backplanes in Gen8+ OLED displays.

Prof. Chen is currently Distinguished Professor in the Department of Photonics (DoP), National Yang Ming Chiao Tung University. He received the B.S. and master's degrees in Chemistry from National Taiwan University, Taiwan, and the Ph.D. degree in Materials Science and Engineering from the University of California, Los Angeles. He has been with DoP since Feb. 2004. He has published more than 160 journal papers and 5 book chapters. Prof. Chen is Optica Fellow and Fellow of the Royal Society of Chemistry. His research interests include organic/perovskite electronics and materials, plasmonic materials, machine learning for materials screening, and low-dimensional nanomaterials.

Perovskite solar cells (PSCs) have emerged as promising candidates for both outdoor and indoor energy harvesting due to their high power conversion efficiencies (PCEs), low fabrication costs, and mechanical flexibility. In this presentation, we propose methods, including bandgap tuning, self-adaptive interfacial engineering at the anodes and surface passivation, for improving the PCEs of inverted PSCs. We enhance the device performance through self-adaptive interfacial engineering at the anode, which improves layer compatibility and charge transport. The optimized devices achieve a remarkable PCE of 33.54% and 38.16% under 200 and 2000 lux indoor lighting, respectively. A PCE higher than 40% has been achieved after using optical harvesting films. Notably, wide-bandgap PSCs treated with tailored passivators reach a PCE of 38.70% under 2000 lux. These results highlight the potential of optimized inverted PSCs for powering low-power electronics in diverse lighting environments, paving the way toward practical and sustainable indoor energy solutions.

Professor Tzung-Fang Guo received Ph.D. degree in Materials Science and Engineering from University of California Los Angeles in 2002. He became a faculty at Department of Photonics, National Cheng Kung University, Taiwan in 2003 and served as the Chairman in 2012 to 2018. His research focuses on high-performance O/PLEDs, polymer PVs, n-type pentacene OTFTs, and the magnetic field effect of organic electronic devices. In addition, he first developed the perovskite-based hybrid solar cells of OPV (p-i-n) device configuration and applied p-type nickel oxide electrode interlayer in fabricating efficient perovskite solar cells and LEDs.

The Singlet fission (SF) dynamics are systematically characterized by measuring magneto-photoluminescence (MPL) under two distinct excitation wavelengths (403 nm and 440 nm) in a tetracene-based thin film. High-energy excitation (403 nm) yields a higher MPL intensity, indicating a higher degree of SF in the absence of an external magnetic field. These results suggest that excitation energy significantly modulates SF and influences the triplet-triplet 1(TT) pair separation. Temperature-dependent MPL measurements reveal the activation energies of 53.36 meV and 68.61 meV, corresponding to the energy required for 1(TT) pair separation for 403 nm and 440 nm excitation, respectively. Moreover, the incident photon-to-current efficiency measurements of the tetracene-based photodiode exhibit a relatively high response in the 300-400 nm wavelength range, peaking at 380 nm. Notably, the integrated current density within this spectral region contributes approximately 31% to the total photocurrent, indicating the possibility of harvesting high-level excitation energy in the tetracene-based photovoltaics.

Dr. Lee received his Ph.D. degree from The University of Tokyo, Tokyo, Japan. He is a Fellow of OPTICA. He is the GlobalFoundries Chair Professor in Engineering and director of the Center for Intelligent Sensors and MEMS at the National University of Singapore, Singapore. He has trained 43+ Ph.D. students graduated from the ECE Dept., NUS. He has co-authored 530+ journal articles. His Google Scholar citation is more than 43000. He has been awarded as Highly Cited Researcher Designation in 2023 and 2024 (Clarivate). His D-index (Discipline H-index) ranks 147th among all electronics and electrical engineering scientists globally (Research.com, 2025).

The rise of applications requiring large-scale artificial intelligence (AI) models, such as ChatGPT, DeepSeek and autonomous vehicle systems, has significantly advanced the boundaries of AI, enabling highly complex tasks in natural language processing, image recognition, and real-time decision-making. To bring AI closer to real-world applications, innovative hardware solutions are urgently needed. This talk introduces the technology platform for enabling waveguided based optical sensing in NIR and MIR. By integrating a responsivity-tunable graphene photodetector onto the silicon waveguide sensing chip, an on-chip waveguide-based in-sensor processing unit is realized in the mid-infrared wavelength range. Furthermore, a near-sensor edge computing (NSEC) system, built on a bilayer AlN/Si waveguide platform, to provide real-time, energy-efficient AI capabilities at the edge. Leveraging the electro-optic properties of AlN microring resonators (MRRs) for photonic feature extraction, coupled with Si-based thermo-optic Mach–Zehnder interferometers (MZIs) for neural network computations, the system represents a transformative approach to AI hardware design.

Silvano Donati was Chair Professor at University of Pavia from 1980 to 2014, and now Emeritus Professor. He has authored 350+ papers and a dozen patents. He has authored two books, ‘Photodetectors’ (2nd ed., Wiley) and ‘Photonic Instrumentation’ (2nd ed., Taylor and Francis), and received several awards from IEEE, in particular the Marconi medal, the Aaron Kressel Award and the Distinguished Service. He LEOS VP Membership (2002-04) and BoG (2004-06), and Chairman of the IEEE Italy Section (2008-09). He has been Visiting Professor at several Universities of Taiwan and is presently with HiSiPIC of NTUST. Prof. See more at http://www.unpv.it/donati

We first outline the operation of self-mixing interferometer, a new tool to measure dimensional and kinematic quantities such as: displacement, distance, vibration amplitude, thickness, angle, and curvature, and also physical quantities like: coupling factors, line width, alfa-factor, and index of refraction. In self-mixing, the laser undergoes self-injection at weak level, leading to AM and FM modulations driven by external optical path length. We will describe a displacement-measuring instrument, by using the up/down counting of mode hops, then extend the measurement to the case of a diffuse target and show how to correct the specklepattern error. We will also report on the successful implementation of two-channel (or, referenced) vibrometer, based on analogue processing of the self-mix signal, in which the speckle-related amplitude errors are removed thanks to a servo-loop concept, and the instrument is capable of true differential operation. A survey of the performance achieved in different application areas will conclude the talk.

Dr. Yi-Chung Tung is a Research Fellow at the Research Center for Applied Sciences, Academia Sinica, where he has been conducting interdisciplinary biomedical research since 2009. Previously, he was a postdoctoral fellow in the Department of Biomedical Engineering at the University of Michigan, Ann Arbor (2006–2009), where he also earned his Ph.D. in Mechanical Engineering in 2005. His contributions have been widely recognized, including the 2020–2022 Scientist with Top 2% Single Year Impact and the 2014 Ta-You Wu Memorial Award. His research focuses on microfluidic cell culture and analysis, biomedical instrumentation, and advanced micro/nano-fabrication techniques.

Understanding the influence of oxygen on cellular functions and behaviors is crucial for investigating various physiological and pathological conditions. To study cellular responses under specific oxygen microenvironments, various advanced in vitro cell culture models have been developed. However, precise manipulation of oxygen microenvironments and accurate characterization of the oxygen variations with great spatiotemporal resolutions remain challenging. In this talk, I will discuss the approaches developed in my lab to manipulate the oxygen microenvironments for cell culture using microfluidic devices, and the oxygen sensing scheme based on frequency-domain fluorescence lifetime imaging microscopy (FD-FLIM) for oxygen microenvironment characterization on organoid and microfluidic cell culture models.

Nan Ei Yu has completed his PhD from Pusan National University on 2002, S. Korea and postdoctoral studies from National Institute for Materials Science (NIMS), Tsukuba, Japan until 2005 March. He is the group leader of, Spectroscopy Sensor Lab. at Advanced Photonics Research Institute (APRI), GIST. She has published more than 100 papers in reputed journals and has been serving as an editorial board member of Optical Society of Korea (OSK) and chief-of editor of Korean Journal of Optics and Photonics.

We demonstrate a two-dimensional (2D) beam steering using a 64-channel dispersive silica arrayed waveguide grating (AWG) optical phased array (OPA) combined with a digital MEMS device via wavelength tuning from 1535 nm to 1565 nm (30 nm), providing a field-of-view (FOV) of 15.8o×12o. Furthermore, we propose and experimentally demonstrate a synchronous transceiving FMCW ranging scheme using a single 64-chammel AWG OPA chip, functioning as both transmitter (Tx) and receiver (Rx), offering a promising approach with a negligible error and highlighting its potential for future solid-state FMCW LiDAR sensors.

Erik Chen is the Co-Founder and CEO of Artilux, responsible for strategic initiatives, corporate growth, technology-market fit and business development across the globe since its establishment in 2014. He has led Artilux to become the renowned world leader of GeSi photonic technology by growing a team with top talents worldwide to empower continuously technology advancement for multiple growing market segments and successfully landing numerous well-known MNCs as strategic partners and customers.Prior to co-founding Artilux, Erik was a researcher at Stanford University in the US from 2007 and then joined Intel Labs as a senior research scientist in 2010. He is passionate on exploring novel semiconductor devices including advanced logic, memory and integrated photonic system to identify and demonstrate a comprehensive and compelling technology solution for problems requiring multidiscipline perspectives.Erik earned both Ph.D. and master’s degrees in Electrical Engineering from Stanford University, and received a bachelor’s degree in Electrical Engineering at National Taiwan University. He holds more than 100 granted and pending patents worldwide and also has authored and co-authored several publications in premier technical journals and conferences, covering heterogeneous integration on CMOS platform, 3D-IC, silicon photonics, GeSi sensing, imaging and more.

In this talk, we will introduce and compare various types of integrated photonic platforms powered by the latest component technology breakthrough to achieve high bandwidth density (Tbps/mm) and energy efficiency (pJ/bit) for high-performance optical interconnects driven by AI applications.

Dr. Janet Chen is Director of Silicon Photonics Development at NVIDIA, leading advances in optical interconnects. With leadership roles at NTT Photonics Labs, HP Labs, FOIT, Lumentum, and Meta, she has launched major optical products and driven innovation in co-packaged optics. Dr. Chen holds B.S. and Ph.D. degrees in Electrical Engineering from National Taiwan University and UC Santa Barbara, is a Senior IEEE Member, and serves on the OFC and ECOC technical committees.

This presentation explores the transformative role of co-packaged optics with integrated silicon photonics in accelerating large-scale AI development. These technological innovations significantly enhance energy efficiency and scalability for AI applications by reducing electrical loss, improving resilience, and optimizing network performance within data center architectures. Strong industry collaboration and ecosystem partnerships are essential to continue advancing these technologies, enabling high-density, high-bandwidth connectivity for robust AI networking.

L. Zimmermann currently serves as professor of silicon photonics at Technische Universität Berlin and as the team leader for silicon photonics group at IHP – Leibniz Institute für innovative Mikroelektronik, a global leader in silicon-germanium technology. With well over 100 scientific journal publications in photonics he made significant contributions to the field. Additionally, he has served as the technical program committee chair or subcommittee chair for multiple top-tier optics and photonics conferences, including the European Conference on Integrated Optics (ECIO), the IEEE Group IV Photonics, the European Conference on Optical Communications (ECOC) and the IEEE Electron Device Meeting (IEDM).

There is a trend of increasingly closer proximity of highly scaled CMOS data processing and photonic transmit (Tx) and receive (Rx) functionality, for example in co-packaged optics. This is not limited to optical communication in the datacenter but pertaining to all domains of high-throughput optical data transport. However, silicon photonics today at 100 GBaud and beyond is difficult to drive directly with advanced CMOS. Therefore, dedicated drive and receive amplifier circuits are frequently designed in advanced BiCMOS technology due to favorable RF properties of bipolar transistors. This talk shall discuss distinct integration options of silicon photonics and high-performance SiGe:C BiCMOS for the implementation of compact high-speed photonic transceiver engines.

Jonathan Cheng was one of the scientific research participants in the FORMOSAT-1 and FORMOSAT-3/COSMIC projects from 2006 to 2012, after which he joined Anritsu in 2015 to support RF, mmWave, and wafer-level probing applications. His responsibilities have included deploying high-frequency E-band probing systems for PCB vendors (antenna array testing for 77/79 GHz automotive radar) and supporting high-speed digital applications up to 110 GHz to align measurement methodologies between PCB and OSAT customers.Currently, his major support projects focus on broadband (70 kHz to 220 GHz) on-wafer probing measurements and silicon photonic (SiPh) frequency-response testing in the early development phase of CPO (Co-Packaged Optics).

The significant growth of the silicon photonics (SiPh) market is driven by increasing demand for high-speed data rate, low-power transmission in data centers, AI/ML applications, and high-performance computing. The SiPh market is projected to grow from USD 2.65 billion in 2025 to USD 9.65 billion by 2030, with a compound annual growth rate (CAGR) of 29.5%. Silicon photonics is a technology that uses silicon to create optical components, enabling high-speed data transmission on a chip. The Anritsu VNA has been uniquely designed to meet your on-wafer device characterization needs from 70 kHz to 110, 125 or 145 GHz depending on the model. An opto-electronic network analyzer (ONA, VNA+MN4765B/MN4775A), such as the Anritsu ME7848A, is a specialized type of network analyzer used to characterize opto-electronic (O/E, MN4765B) and electro-optical (E/O, MN4775A) devices and components.

Kenji Yoshino received his Ph.D. from Okayama University, Japan. He is currently a professor in the Department of Electrical and Electronic Engineering at the University of Miyazaki, where he previously served as an assistant and associate professor. He also holds a concurrent position as a professor at the GX Research Center at the same university. His research specializes in semiconductor engineering, with a focus on the development of compound semiconductor solar cells.

Transparent conductive oxide (TCO) films are essential in applications such as liquid crystal displays, touch panels, and solar cells. Among them, Sn-doped In2O3 (ITO) is the most widely used due to its excellent conductivity and transparency. However, indium is a rare and expensive metal, posing cost and supply issues. To address this, alternative materials such as F-doped SnO2 (FTO) and Ga-doped ZnO (GZO) have attracted attention for their lower cost and comparable performance. FTO and GZO are applied to solar cells and photocatalysts.

Kensuke Nishioka received B.S. degree in chemical engineering from Osaka University in 1998 and M.S. and Ph.D. degrees in materials science from Nara Institute of Science and Technology in 2001 and 2004, respectively. He was an Assistant Professor at Japan Advanced Institute of Science and Technology, Japan from 2004 to 2007 and an Associate Professor at University of Miyazaki, Japan from 2007 to 2016. Since 2016, he has been a Professor at University of Miyazaki, Japan. His research interests include photovoltaic systems, solar to hydrogen, agrivoltaics, and vehicle integrated photovoltaics.

Photovoltaics (PV) is one of the most promising renewable energy generation methods. The prices of solar cell modules have been falling in recent years which has facilitated introduction of PV. Solar energy has a low energy density of 1,000 W/m2, even on sunny days, which necessitates having a large area for the PV setup to be used as the primary power source. Other important issues include determining how to shift daytime power generated by PV to nighttime power and its transport. Securing the area for PV installation requires the exploration of new applications and installation locations. Storage such as batteries and hydrogen is essential for temporal and spatial shifts in power. Above all, the introduction of PV equipment must have a small environmental impact. Based on the empirical results, new applications and future vision for photovoltaic technology will be discussed, focusing on solar carport, wall-mounted photovoltaics, and agrivoltaics.

Mamoru Furuta is a Professor in the School of Engineering Science, and a Director of Research Institute, Kochi University of Technology, Japan. In 1988-2004, he had a wide variety of work experience in the company, from R&D to the mass production of LTPS displays at the Central Research Laboratory of Panasonic, Japan. Since 2005, he has been working on metal oxide semiconductor research at the Kochi University of Technology, Japan. He received the Special Recognition Award from SID in 2021 for his contribution to oxide TFT research. He also received a Distinguished Paper Award from SID in 2006 and 2025. His current research interests include high-performance and highly stable polycrystalline metal-oxide semiconductor thin-film transistors (TFTs) and their applications to displays and LSIs. He has served as the Editor of the IEEE Transaction of Electron Devices (T-ED), the Applied Physics Express (APEX), and the Japanese Journal of Applied Physics (JJAP).

Metal oxide semiconductors have received significant attention for their use in next-generation flat-panel displays and LSIs. One of the significant advantages of metal oxides is their extremely low leakage current, which can markedly reduce the power consumption of electric devices. An In–Ga–Zn–O (IGZO), which is a representative metal oxide, suffers from low mobility and reliability issues compared to polycrystalline silicon devices. Many efforts have been made to improve the performance and reliability of metal oxides from the standpoints of material science and device physics. In this presentation, we propose the polycrystalline indium oxide, which is formed by solid-phase crystallization, for high-mobility thin-film transistors for future low-power devices.

Shin-Ichiro Kuroki is Professor of Hiroshima University, and Vice-Director of Research Institute for Semiconductor Engineering, Hiroshima University, Japan. He received Ph. D degree in physics from Hiroshima University in 2002. From 2002 to 2005, he worked for the Research Center for Nanodevices and Systems of Hiroshima University as a Researcher. In 2005, he jointed Graduate School of Engineering, Tohoku University, Japan, as Assistant Professor. In 2012, he joined the Research Institute for Nanodevice and Bio-Systems, Hiroshima University, as Associate Professor. In 2019, he became Professor of Hiroshima University.

High-temperature and radiation hardened electronics have been required for human activities in space, accelerator, and also nuclear power plants. For the extreme environment applications, silicon carbide (SiC) with wideband gap is one of the promising semiconductors. Our objective is to realize the SiC extreme environments electronics, which consist of SiC processor, sensor systems, etc. In this work, 4H-SiC CMOS circuits and image sensors were investigated for the extreme environment applications. The SiC integrated circuits including amplifier circuits and static random access memory (SRAM) successfully worked in a high temperature of up to 500°C, and the SiC CMOS image sensors were demonstrated at high gamma-ray exposure of 2 MGy.

Wenchang Yeh has completed his PhD from Tokyo Institute of Technology, Japn in 2000. He was an assistant professor and then an associate professor in Nation Taiwan University of Science and Technology during 2002 to 2010, and then became an associate professor in Shimane University, Japan from 2010, and from 2022, he became a professor.

The concept of tabletop monolithic 3D-IC Fab will be proposed and introduced. This fab is based on sputter chambers, and micro-chevron laser scanning for formation of single crystal stripe in semiconductor films on SiO2. Properties of (001) single crystal stripes formed on SiO2, and excellent characteristics of MOSFETs fabricated on the Si stripe will be introduced. The MOSFETs were fabricated by all sputter film deposition processes so no toxic and explosive gas was used.

Yoshitaro Nose received his Ph.D. from Osaka University, Japan, and subsequently worked as a research associate at IMR, Tohoku University. He moved to Kyoto University in 2009, where he is currently an associate professor. His research focuses on the bulk and thin-film crystal growth of compound semiconductors, particularly chalcopyrite phosphides and arsenides, as well as monochalcogenides. In 2020, he joined a startup company, CHALCOGENIC Co., Ltd. which was established based on his patents and supplies monochalcogenide materials such as SnS for applications in batteries and optoelectronic devices.

We study chalcopyrite phosphide solar cells, and this talk introduces our recent progress, including thin film deposition and hetero-interfaces engineering in devices. Our research focuses on the chalcopyrite phosphide ZnSnP2 (ZTP) as a promising absorber material and achieved the best efficiency of 3.9 % in ZTP solar cells. Key results are: (i) reduction of contact resistance at the ZTP/back electrode by inserting a back buffer layer, (ii) exploration of alternative partner materials for pn junction to replace CdS, and (iii) MBE growth of ZTP thin films assisted by machine learning techniques. We also present recent advances in ternary phosphides for photovoltaic applications.