Subject：A Phonon Laser of a Levitated Nanoparticle
Speaker：Dr. Wenchao Ge
Emcee：Prof. Jiteng Sheng
Time：10:30m, 20th Dec, 2018
Place：Science Building A814
Abstract：
Nanoparticles trapped by optical forces in vacuum are providing increasing insight into physical processes at mesoscopic scales, displaying promise as detectors of weak forces and interactions, facilitating hybrid platforms that couple mechanical motion to electron spin and charge, and aiming to perform fundamental tests of quantum mechanics and gravity. In this talk, I will discuss a new capability to the field of levitated optomechanics—a phonon laser. I will present our theoretical proposal and an experimental demonstration of the phonon laser based on the center-of-mass oscillation of a silica nanosphere levitated in an optical tweezer under vacuum.
