Fig. 2: Linear versus nonlinear responses of the ω1 resonant mode parametrically coupled to the phonon cavity.
From: Nonlinearity-mediated digitization and amplification in electromechanical phonon-cavity systems
a Resonant response of the ω1 mode in the linear regime under different pump frequency ωp, when pumping near the red sideband ωred of the phonon-cavity. b 2D color plot of the same data as in a; same hereafter. The 2D color plots allow key features in the frequency domain (along both ωd and ωp) to be better visualized, and enable efficient comparison to the theory plots in Fig. 3. c, d Resonant response in the linear regime when pumping near the blue sideband ωblue of the phonon-cavity. e–h Nonlinear response of the ω1 mode with an upward frequency sweep, under different pump frequency ωp near the red sideband ωred (e, f) and blue sideband ωblue (g, h), respectively. i–l Nonlinear response of the ω1 mode with a downward frequency sweep, under different pump frequency ωp near the red sideband ωred (i, j) and blue sideband ωblue (k, l), respectively, showing clear modulation of the bi-stability frequency ωb with distinct patterns. Experimental details are provided in “Methods” and SI 1.2, with additional data in SI 3.1.
