Fig. 5: Eigen-mode rotation angle and optomechanical coupling constants.
From: Near-field cavity optomechanical coupling in a compound semiconductor nanowire
a Angle between x-axis and a vibrating mode in the nanowire. The purple circles are the experimentally observed rotation angles, and the black solid line shows data fitted with a theoretical model. b Linear dispersive optomechanical coupling constants, \({g}_{\omega }^{(1)}\), estimated from the net phase modulation. c Quadratic dispersive optomechanical coupling constants, \({g}_{\omega }^{(2)}\), estimated from the frequency shifts. d Quadratic dissipative optomechanical coupling constants, \({g}_{\kappa }^{(2)}\), estimated from the linewidth broadening. The red (blue) circles corresponds to that of mode 1 (mode 2). The insets are conceptual illustrations of modulation in mechanical responses via each optomechanical coupling (corresponding to the illustration in Fig. 1b, c).
