Figure 4 | Scientific Reports

Figure 4

From: Opto-thermally excited multimode parametric resonance in graphene membranes

Figure 4

Comparison of experimental mechanical responses to theory. (a) Directly driven response at 7.1 and 250.9 mV RMS driving voltage and the fit obtained from Eq. 1. (b) Parametric response and fit at 250.9 mV RMS driving voltage and the fit from Eq. 1. (c) Directly driven response at 446.2 mV RMS driving level, the fit from Eq. 1 shows a disagreement with the backward sweep, highlighted by black arrows. (d) Parametric response at 446.2 mV (RMS). Black arrows highlight the disagreement between Eq. 1 and experiment. (e) Parametric resonance instability map for the fundamental mode of drum 2, compared to the prediction from Eq. 1. (f) Parametric resonance instability map for the fundamental mode of drum 1 (Fig. 2).

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