主 题：Chip-scale PhC cavity optomechanics for the applications on reference clock and precision measurements
Dr. Yongjun Huang received the M.S. and PhD. degrees from University of Electronic Science and Technology of China (UESTC), Chengdu, China, in June 2010, and December 2016. From September 2013 to September 2015, he was a visiting scholar with the Solid-State Science and Engineering, and Mechanical Engineering, Columbia University, New York City, NY, USA, and a visiting project scientist with the Electrical Engineering, University of California at Los Angeles (UCLA), Los Angeles, CA, USA. He is currently an Associate Professor with School of Information and Communication Engineering, UESTC. His research interests include chip-scale photonic crystal cavity optomechanics, low phase noise RF sources, and high-resolution force/field sensors. He also researches on the optomechanical metamaterials and metasurfaces for EM wave-front dynamic manipulations.
This talk will present our recently research achievements on the air-slot line-defected photonic crystal nano optomechanical cavity. Firstly, we developed a monolithic integration of photonic crystal optomechanical oscillators and on-chip high speed Ge detectors by using the silicon CMOS platform. With the generation of both high harmonics (up to 59th order) and subharmonics (down to 1/4), our chipset provides multiple frequency tones for applications in both frequency multipliers and dividers. Moreover, the synchronization in such air-slot photonic crystal optomechanical oscillators are observed and discussed. These characteristics enable optomechanical oscillators as a frequency reference platform for radio-frequency-photonic information processing. Then we introduce the PhC optomechanical cavity platform for precision measurements. The proposed optomechanical cavity with large mass can operate at ~77.7 kHz. Two applications for acceleration and magnetic field detections are proposed and analyzed briefly. The initial measured results obtained in our group are presented, including the sensitivity, resolution, dynamic range and bias instability.
编辑：王晓刚 / 审核：王晓刚 / 发布者：陈伟