Abstract: Atomically thin two-dimensional crystals such as graphene, transition metal dichalcogenides, and black phosphorus and wide-bandgap materials such as silicon carbide and aluminum scandium nitride with unconventional and unique properties, are fascinating building blocks for constructing novel nanoscale electronic and photonic devices and transducers. In this presentation, Dr. Lee will showcase his recent research on advancing solid-state devices and systems by harnessing these emerging material platforms. After a brief overview of the fundamental properties and their applications in electronic and optoelectronic devices, he will focus on a technologically important class of nanoscale transducers, nanoelectromechanical systems (NEMS). Dr. Lee will exemplify the achievements of efficient signal transduction and resonant NEMS with remarkable dynamic range, tunability and giant parametric amplification and linewidth narrowing via engineering strong internal multiphysics coupling in such new material platforms. These devices also make novel resonant sensors. He will validate the functionalities and further improve them by employing a stable feedback oscillator scheme for real-time tracking and sensing. Toward coherent phononic transduction and quantum engineering, Dr. Lee will introduce the first phononic frequency combs based on controlling mode coupling in 2D NEMS. He will also show resonant microelectromechanical systems (MEMS) capable of operating in harsh environments, such as at high temperature and under radiation, with excellent stability toward building ultrasensitive sensors. Finally, he will discuss his future research plans and perspectives on engineering new generations of multifunctional devices and integrated systems, to address emerging challenges in semiconductor research.
Bio: Dr. Jaesung Lee received his Ph.D. in electrical engineering from Case Western Reserve University in 2017. He received B.S. and M.S. degrees in electrical engineering from the University of Electro-Communications in, Tokyo, Japan. He is currently an assistant professor in the Department of Electrical and Computer Engineering at the University of Texas at El Paso. His research interests have focused on developing micro/nanoscale devices (e.g., NEMS/MEMS, optoelectronic, phononic devices) using advanced materials (e.g., 2D crystals and wide-bandgap semiconductors), towards building integrated systems for signal processing and sensing, in both classical and quantum regimes. Dr. Lee has published more than 40 peer-reviewed articles in high-impact and multidisciplinary journals, including Science Advances, Nature Communications, Applied Physic Reviews, ACS Nano and Nano Letters. He received a Best Paper Award at the 2014 IEEE International Frequency Control Symposium and a Best Paper Award at the American Vacuum Society's 61st International Symposium & Exhibition. Dr. Lee is a member of IEEE, AVS and Optica, and has served as a referee for several highly reputable journals including Nano Letters, Applied Physics Letters and IEEE Sensors Letters. He is the technical program chair for the MEMS/NEMS Technical Group at the 69th AVS International Symposium & Exhibition.
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