Cavity Optomechanical Bistability with an Ultrahigh Reflectivity Photonic Crystal Membrane.

ABSTRACT: Photonic crystal (PhC) membranes patterned with sub-wavelength periods offer a unique combination of high reflectivity, low mass, and high mechanical quality factor. Using a PhC membrane as one mirror of a Fabry-Perot cavity, a finesse as high as F=35000(500) is demonstrated, corresponding to a record high PhC reflectivity of R=0.999835(6) and an optical quality factor of Qopt≈109 . The fundamental mechanical frequency is 426 kHz, more than twice the optical linewidth, placing it firmly in the resolved-sideband regime required for ground-state optical cooling. The mechanical quality factor in vacuum is Q=1.1(1)×106 , allowing values of the single-photon cooperativity as high as C0=6.6×10-3 . Optomechanical bistability is easily observed as hysteresis in the cavity transmission. As the inpu

SUBMITTER: Zhou F 

PROVIDER: S-EPMC12013228 | biostudies-literature | 2023

REPOSITORIES: biostudies-literature