A multiphysics model for ultra-high frequency optomechanical resonators optically actuated and detected in the oscillating mode

Optomechanical systems combine extreme sensitivity and bandwidth in the control of mechanical motion, interest for various applications. Integrated on a chip, actuated detected all-optically by single laser, they could disrupt sensing technologies. We introduce here multiphysics model that describes their operation oscillating mode, under sinusoidal modulation when both photothermal forces radiation pressure/electrostriction are present, (non)linear absorption occurs device. The is validated systematic experiments ultra-high frequency optomechanical disk resonators leads to quantitative assessment amplitude phase demodulated output signal, which carries information.