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(a) SEM view of a GaAs disk ( diameter and 200 nm thickness) suspended on an AlGaAs pedestal. (b) Electric field intensity of the optical mode . (c) Deformation profile of the mechanical breathing mode. (d) Schematics of the near-field optomechanical spectroscopy experiment. The linear polarization is selected by a fiber polarization controller (FPC) and a half-wave plate. PD stands for photodetector.
[(a)–(c)] Normalized optical transmission spectrum of optical resonance measured at low and high optical power in three disks. (d) The WGM wavelength as a function of the disk radius. (e) Relative optical resonance shift as a function of the total transmitted optical power. (f) The temperature change as a function of normalized resonance shift due to thermal-optic effect.
[(a)–(c)] The rf-spectrum of the breathing mechanical mode from each disk taken in ambient conditions. (d) A calibrated Brownian motion spectrum of disk 1.
Experimental (superscript e) and simulated (superscript s) mechanical and optomechanical parameters of three miniature GaAs disks.
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