The fast-growing demand for sensing, actuation, computation and communication poses great challenges that the conventional semiconductor electronics integrated circuits alone seem insufficient to address. Implementing disruptively innovative solutions is one of the major research focuses for both industry and academia. I am interested in solutions on the device level that take the unique advantages of photonics and phononics to complement electronics. In this talk, I will present my research on the on-chip manipulation of light (photons) with mechanical structures and sound (phonons) in nano-optomechanical systems (NOMS) and GHz acousto-optic devices, enabled by the state-of-the-art nanofabrication tools. Specifically, I will present 1) a NOMS switch device that uses optical force to mechanically switch light on and off to achieve optical signal amplification, 2) a NOMS seesaw device that can mechanically shuttle photons between distant photonic nanocavities and measure spin angular momentum of photons, and 3) integrated acoustic wave devices operating at microwave frequency up to 20 GHz that induce strong acousto-optic modulation of photonic nanocavities and suspended optomechanical waveguides. My research is an important step toward seamlessly integrated electronics, photonics and phononics devices on heterogeneous material platforms, which are potentially capable of addressing the challenges in future on-chip sensing, actuating, signal and information processing and computing in the classical and quantum regimes.

报告人简介：Dr. Huan Li received his Bachelor and Master of Engineering degrees in 2007 and 2009 from the Department of Electrical Engineering at Tsinghua University, Beijing, China. He received his Ph.D. degree in 2015 from the Department of Electrical and Computer Engineering at the University of Minnesota, Twin Cities, where he continued his research as a postdoctoral associate until February 2019, when he moved to the University of Washington as a Research Associate. During his Ph.D. research, he was awarded Doctoral Dissertation Fellowship for 2013-2014 by the Graduate School of the University of Minnesota. He also received 2014 Chinese Government Award for Outstanding Self-financed Students Abroad from China Scholarship Council.