Figure 2: Multimode thermomechanical resonances observed in separate microspectroscopic measurements.
From: Spatial mapping of multimode Brownian motions in high-frequency silicon carbide microdisk resonators
Wide-range thermomechanical noise spectra measured from a 19.5-μm-diameter SiC microdisk resonator, when the ~1 μm laser spot is focused at the (a) centre of the disk, (b) rim of the disk and (c) another location at the rim, ~60° rotated with respect to the spot in b. Sequence labels for all the observed modes are shown in b. Insets: optical images clearly showing the locations of the laser spot. (d–g) High-spectral-resolution scans of these thermomechanical resonances with extracted quality (Q) factors. Dashed lines are fits to the resonances based on finite-Q harmonic resonator model (equation 1).
