Optimized optomechanical crystal cavity with acoustic radiation shield

Jasper Chan, Amir H. Safavi-Naeini, Jeff T. Hill, Seán Meenehan, Oskar Painter
2012 Applied Physics Letters  
We present the design of an optomechanical crystal nanobeam cavity that combines finite-element simulation with numerical optimization, and considers the optomechanical coupling arising from both moving dielectric boundaries and the photo-elastic effect. Applying this methodology results in a nanobeam with an experimentally realized intrinsic optical Q-factor of 1.2x10^6, a mechanical frequency of 5.1GHz, a mechanical Q-factor of 6.8x10^5 (at T=10K), and a zero-point-motion optomechanical
more » ... ptomechanical coupling rate of g=1.1MHz.
doi:10.1063/1.4747726 fatcat:fc5x4htgtnggley55tthownddm