Fig. 4: Two-mode mechanical responses with static optical forces.
From: Near-field cavity optomechanical coupling in a compound semiconductor nanowire
a Theoretically predicted two-mode power spectral density (PSD) with optical force field in terms of gap x. The black dashed lines show the two-mode frequencies without rotation of eigen-modes. b Experimentally observed two-mode power spectral density with respect to x coordinate. c, d Mechanical frequencies and linewidths with respect to x coordinate. The red and blue circles correspond to them in mode 1 (lower-frequency mode) and mode 2 (higher-frequency mode), respectively.
