Vibrational resonance is a generic phenomenon found in many different bistable systems whereby a weak low-frequency signal is amplified by use of an additional nonresonant high-frequency modulation. The realization of weak signal enhancement in integrated nonlinear optical nanocavities is of great interest for nanophotonic applications where optical signals may be of low power. Here, we report experimental observation of vibrational resonance in a thermo-optically bistable photonic crystal optomechanical resonator with an amplification up to +16 dB. The characterization of the bistability can interestingly be done using a mechanical resonance of the membrane, which is submitted to a strong thermoelastic coupling with the cavity.

中文翻译：

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热光学光机械纳米腔中的振动共振放大

振动共振是在许多不同的双稳态系统中发现的普遍现象，通过使用额外的非共振高频调制来放大微弱的低频信号。在集成非线性光学纳米腔中实现弱信号增强对于光信号可能具有低功率的纳米光子应用具有重要意义。在这里，我们报告了热光双稳态光子晶体光机械谐振器中振动共振的实验观察，放大率高达 +16 dB。有趣的是，可以使用膜的机械共振来表征双稳态，膜的机械共振与空腔发生强热弹性耦合。