Figure 3: Electrical and optical spectra for a 48.
From: Stimulated optomechanical excitation of surface acoustic waves in a microdevice
9 MHz vibration. Spectra were obtained in a sphere of radius 162 μm with pump wavelength 1,567 nm. The electrical spectrum represents the beat note between the two optical signals. The absence of the anti-Stokes sideband in the optical spectrum as well as the absence of higher harmonics clearly indicates that this is not a mechanical breathe mode. The wide optical spectrum (bottom) confirms that our observation is not disturbed by any other optical lines such as those arising from four-wave mixing or Raman scattering.
