OSA Student Chapter Meeting
SPEAKER: Zhenhuan Yi
TITLE: An all-dielectric matasurface as a broadband optical frequency mixer
A GaAs-based dielectric metasurface has been demonstrated as an optical frequency mixer that concurrently generates eleven new frequencies spanning the ultraviolet to near-infrared. The even and odd order nonlinearities of GaAs enable the observation of second-harmonic, third-harmonic, and fourth-harmonic generation, sum-frequency generation, two-photon absorption-induced photoluminescence, four-wave mixing and six-wave mixing. The simultaneous occurrence of these seven nonlinear processes is assisted by the combined effects of strong intrinsic material nonlinearities, enhanced electromagnetic fields, and relaxed phase-matching requirements. Such ultracompact optical mixers may enable a plethora of applications in biology, chemistry, sensing, communications, and quantum optics.
Reference: S. Liu et al., Nature Commun. 9, 2507(2018).
Source: Sci. Adv., doi: 10.1126/sciadv.aat2355
Friday, September 14, 2018
IQSE 578, 12:00
Mitchell Physics Building
Department of Physics and Astronomy
Institute for Quantum Science and Engineering
Texas A&M University
(Pizza lunch as usual. Newcomers welcome!)
Host: Sean O'Connor
THE INSTITUTE FOR QUANTUM
SCIENCE AND ENGINEERING