Fig. 4: Experiments and simulations of structural parameter modulation.
From: Gigahertz optoacoustic vibration in Sub-5 nm tip-supported nano-optomechanical metasurface
a SEM images of the TSNOMS with different nanohole diameters. b FFT spectra of the measured reflection optomechanical responses with varying diameters of nanohole. Inset: Oscillation frequency as a function of nanohole diameter. No error bars are added since the oscillation frequency tested is almost constant. c Simulated frequency spectra of the TSNOMS with different nanohole diameters. d Transient reflection spectra of the optomechanical metasurface with varying thickness of metasurface. e FFT spectra of the measured reflection optomechanical responses with different thicknesses. The black lines are experimental data, and the red lines are simulation results.
