Cryogenic properties of optomechanical silica microcavities
Cryogenic properties of optomechanical silica microcavities
We report the study of the optical and mechanical properties of high-$Q$ fused silica microtoroidal resonators at cryogenic temperatures (down to 1.6 K). A thermally induced optical multistability is observed and theoretically described, originating from the reverse thermally induced optical frequency shift. Moreover the influence of structural defect states (two …