In this talk, I will discuss our fundamental research in low symmetry semiconductor materials and the development of new ultrafast imaging techniques for photonics science research. In the first part of the talk, I will discuss our work in studying low symmetry materials such as black phosphorus and perovskites chalcogenides. Their unique optical properties resulting from their low symmetry crystal lattice will be discussed. I will also discuss our recent work in studying the interesting mechanical properties of inorganic double helical crystal material SnIP, discovering its record low Young’s modulus and high mechanical flexibility. In the second part of the talk, I will present our work in developing and utilizing the compressive ultrafast photography method to achieve real-time observation and control of optical chaos phenomenon. I will also comment on the potential applications of this new ultrafast imaging technique in the broader fields of scientific and technological research.
Han Wang joined the University of Hong Kong (HKU) in 2023 as a full professor in the Department of Electrical and Electronic Engineering, and Co-Director of the Institute of Mind. He received the B.A. degree in electrical and information science from Cambridge University in 2007 and his PhD degree from Massachusetts Institute of Technology (MIT) in 2013. From 2013 to 2014, he worked in the Nanoscale Science and Technology group at IBM T. J. Watson Research Center. From 2014 to 2023, he was with the Department of Electrical and Computer Engineering at the University of Southern California, first as an Assistant Professor and then as a tenured Associate Professor. In 2021-2023, he also led the new material and device research department at Taiwan Semiconductor Manufacturing Company (TSMC) Corporate Research, in parallel to his faculty position at USC. His research interests include advanced microelectronics technology based on emerging semiconductor materials and devices for advanced computing, communication and sensing. His work has been recognized with numerous awards including the United States Army Early Career Award for Scientists and Engineers (Army-ECASE), IEEE Nanotechnology Council Early Career Award, the United States Army Research Office Young Investigator Award, US National Science Foundation CAREER Award, the Roger A. Haken Best Paper Award in IEEE International Electron Device Meeting (IEDM) and the MIT Jin-Au Kong Best Doctoral Thesis Award. He is also the IEEE Nanotechnology Council Distinguished Lecturer 2020-2021. He currently serves on the IEDM technical program committee (2022-2023) and is a member of the IEEE Electron Device Society Neuromorphics Technical Committee.
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