Ultrafast Laser-enabled High-resolution Ultrasonic Characterization of Semiconductor Interior Structures
by Zhongqing Su
The Hong Kong Polytechnic University, Hong Kong, China
Abstract
Path-breaking advances in ultrafast laser technology have shed new light on optical–acoustic coupling and opened up intriguing application prospects. In this talk, we will report on a new nondestructive evaluation framework based on ultrafast laser ultrasonics, from fundamental theory to implementation details. Making use of the ultrashort acoustic wavelength of laser-generated ultrasound, the femtosecond-laser-enabled ultrasonics techniques have enabled super high-resolution material characterization at the nanoscale. The approach has been experimentally demonstrated by characterizing the monocrystalline semiconductor wafers which are of a high degree of anisotropy, and imaging interior features of an opaque, stacked micro-system, three-dimensionally and contactlessly.
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Zhongqing SU |
Biography Zhongqing Su (PhD) is the Chair Professor of Intelligent Structures and Systems and Head of the Department of Mechanical Engineering at The Hong Kong Polytechnic University, Hong Kong. He is the current Editor-in-Chief of the journal Ultrasonics (Elsevier) and holds the Changjiang Chair Professorship. He is also the current President of The Hong Kong Society of Theoretical and Applied Mechanics. His research interests span the area of ultrasonics, structural health monitoring (SHM), wave propagation, smart materials, intelligent systems, and advanced composites. Prof. Su earned his PhD in 2004 from the School of Aerospace, Mechanical and Mechatronic Engineering at The University of Sydney, Australia. Prof. Su was the Chair of a number of key international conferences in his field, including the 7th Asia-Pacific Workshop on SHM (Hong Kong, 2018), the SPIE Conference on Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2023 (Long Beach, the United States, 2023), and the SPIE Conference on Health Monitoring of Structural and Biological Systems XVIII (Long Beach, the United States, 2024; Vancouver, Canada, 2025). He is an elected Distinguished Fellow of the International Institute of Acoustics and Vibration (IIAV). More details about Prof. Zhongqing Su can be found at https://www.polyu.edu.hk/me/people/academic-teaching-staff/su-zhong-qing-prof/ |
Advances in Millimeter-Wave Circuit Design for Future Communications
by Kenichi Okada
Institute of Science Tokyo, Tokyo, Japan
Abstract
Millimeter-wave circuit technologies are advancing rapidly to meet the growing demand for high-speed, high-capacity, and long-distance wireless communication. Two major directions are driving this progress: the use of higher frequencies such as sub-terahertz (Sub-THz) to achieve ultra-fast data transmission even over longer distances, and the deployment of massive MIMO using mmWave to dramatically increase communication capacity. This keynote will first introduce a theoretical outlook on future trends in mmWave wireless communication for next-generation communication systems including 5G, beyond 5G, 6G, and satellite applications. Following this perspective, the talk will highlight recent developments in ultra-fast Sub-THz radios, focusing on their potential to support higher data rates and extended coverage. The presentation will then explore mmWave massive MIMO technologies, with a particular emphasis on the emerging role of discrete-time operation in mmWave circuit design. This approach enables scalable phased-array architectures realizing TD-MIMO (Time Division MIMO), supporting the development of energy-efficient, high-capacity wireless systems with enhanced flexibility and integration potential. The talk aims to provide insights into the evolving landscape of mmWave circuit design and its impact on future wireless communication.
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Kenichi Okada |
Biography Kenichi Okada (PhD) received the B.E., M.E., and Ph.D. degrees in Communications and Computer Engineering from Kyoto University, Kyoto, Japan, in 1998, 2000, and 2003, respectively. From 2000 to 2003, he was a Research Fellow of the Japan Society for the Promotion of Science in Kyoto University. In 2003, he joined Tokyo Institute of Technology as an Assistant Professor, where he is currently a Professor of Electrical and Electronic Engineering in Institute of Science Tokyo. He has authored or co-authored more than 500 journal and conference papers. His current research interests include millimeter-wave and terahertz CMOS wireless transceivers for 20/28/39/60/77/79/100/300GHz for 5G, WiGig, satellite and future wireless systems, digital PLL, synthesizable PLL, atomic clock, and ultra-low-power wireless transceivers for Bluetooth Low-Energy, and sub-GHz applications. Prof. Okada is a member of the Institute of Electrical and Electronics Engineers (IEEE), the Institute of Electronics, Information and Communication Engineers (IEICE), the Information Processing Society of Japan (IPSJ), and the Japan Society of Applied Physics (JSAP). He was a recipient or co-recipient of the Ericsson Young Scientist Award in 2004, the A-SSCC Outstanding Design Award in 2006 and 2011, the ASP-DAC Special Feature Award in 2011 and Best Design Award in 2014 and 2015, the MEXT Young Scientists’ Prize in 2011, the JSPS Prize in 2014, the Suematsu Yasuharu Award in 2015, the MEXT Prizes for Science and Technology in 2017, the RFIT Best Paper Award in 2017, the IEICE Best Paper Award in 2018, the RFIC Symposium Best Student Paper Award in 2019, the IEICE Achievement Award in 2019, the DOCOMO Mobile Science Award in 2019, the IEEE/ACM ASP-DAC Prolific Author Award in 2020, the Kenjiro Takayanagi Achievement Award in 2020, the KDDI Foundation Award in 2020, the IEEE CICC, Best Paper Award in 2020, the IEEE ISSCC Author-Recognition Award in 2023, the IEEE A-SSCC Top-11 Contributor Award, IEEE MWCL Tatsuo Itoh Best Paper Award, and more than 50 other international and domestic awards. He is a Fellow of IEEE. He is/was a member of the technical program committees of IEEE International Solid-State Circuits Conference (ISSCC), VLSI Circuits Symposium, European Solid-State Circuits Conference (ESSCIRC), Radio Frequency Integrated Circuits Symposium (RFIC), Asian Solid-State Circuits Conference (A-SSCC), and he is/was also Guest Editors and an Associate Editor of IEEE Journal of Solid-State Circuits (JSSC), an Associate Editor of IEEE Transactions on Microwave Theory and Techniques (T-MTT), a Distinguished Lecturer and AdCom member of the IEEE Solid-State Circuits Society (SSCS). More details about Prof. Kenichi Okada can be found at https://www.ssc.p.isct.ac.jp/en/okada/ |
AI on the Space Edge
by Tat-Jun Chin
Adelaide University, South Australia, Australia
Abstract
The space sector is experiencing significant growth, due to renewed momentum in state-led space programs, sustained scientific interest in space, and explosive growth in commercial space ventures. As space utilization models grow in scope, ambition and complexity, the need for autonomy in space systems also rapidly increases. In addition to serving more conventional roles (e.g., Earth observation, communication), future satellites will have to conduct more advanced tasks, such as on-orbit servicing, in-space construction and space debris removal, where real-time sensing and decision making are crucial to enable safe interactions between spacecraft. Moreover, as space exploration reaches further into space, the longer delays in roundtrip communication necessitates intelligent spacecraft and space robots that can make decisions autonomously based on in situ sensor measurements. While AI has been instrumental to the development of autonomous systems on Earth, endowing space systems with AI requires surmounting non-trivial challenges, such as little training data from the operating domain and limitations on compute resources due to the harshness of the space environment. This talk explores recent progress towards realizing AI on space-borne edge devices. Through this talk, it is also hoped that the significant difficulty posed by space motivates alternative approaches to the current dominant AI paradigm towards building autonomous systems.
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Tat-Jun Chin |
Biography Tat-Jun Chin (PhD) is Professor of Computer Science at Adelaide University, where he leads the AI for Space Group. He received his PhD in Computer Systems Engineering from Monash University in 2007, which was partly supported by the Endeavour Australia-Asia Award, and a Bachelor in Mechatronics Engineering from Universiti Teknologi Malaysia in 2004, where he won the Vice Chancellor’s Award. Tat-Jun’s research interest lies in optimisation for computer vision and machine learning, and their application to intelligent satellites and space robotics. He has published more than 150 research articles on the subject, and has received multiple accolades for his research, including a CVPR award (2015), a BMVC award (2018), Best of ECCV (2018), three DST Awards (2015, 2017, 2021), an IAPR Award (2019), an RAL Best Paper Award (2021), and a nomination for ECCV Best Paper Award (2024). He was a Finalist in the Academic of the Year Category at Australian Space Awards 2021. Tat-Jun is currently Visiting Professor at the European Space Agency's Philab and was a SmartSat CRC Professorial Chair in 2020-2025. More details about Prof. Tat-Jun Chin can be found at https://researchers.adelaide.edu.au/profile/tat-jun.chin |
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Hanoi University of Science and Technology
Danang University of Science and Technology
Ho Chi Minh City University of Technology
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