High-mechanical-frequency characteristics of optomechanical crystal cavity with coupling waveguide.

ABSTRACT: Optomechanical crystals have attracted great attention recently for their ability to realize strong photon-phonon interaction in cavity optomechanical systems. By far, the operation of cavity optomechanical systems with high mechanical frequency has to employ tapered fibres or one-sided waveguides with circulators to couple the light into and out of the cavities, which hinders their on-chip applications. Here, we demonstrate larger-centre-hole nanobeam structures with on-chip transmission-coupling waveguide. The measured mechanical frequency is up to 4.47 GHz, with a high mechanical Q-factor of 1.4 × 10³ in the ambient environment. The corresponding optomechanical coupling rate is calculated and measured to be 836 kHz and 1.2 MHz, respectively, while the effective mass is estima

SUBMITTER: Huang Z 

PROVIDER: S-EPMC5043188 | biostudies-literature | 2016 Sep

REPOSITORIES: biostudies-literature