We propose and demonstrate experimentally the strong dissipative acousto-optic interaction between a suspended vibrating microfiber and a whispering-gallery microcavity. On the one hand, the dissipative response driven by an external stimulus of acoustic waves is found to be stronger than the dispersive response by 2 orders of magnitude. On the other hand, dead points emerge with the zero dissipative response at certain parameters, promising the potentials in physical sensing such as precise measurements of magnetic field and temperature. The strong dissipative acousto-optic interaction is then explored for ultrasensitive detection of broadband acoustic waves. A noise equivalent pressure as low as 0.81 Pa at 140 kHz in air is demonstrated experimentally, insensitive to cavity $Q$ factors and does not rely on mechanical resonances.

中文翻译：

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光学微腔中的耗散声光相互作用

我们提出并通过实验证明了悬浮振动微纤维和回音壁微腔之间的强耗散声光相互作用。一方面，由声波的外部刺激驱动的耗散响应被发现比色散响应强 2 个数量级。另一方面，在某些参数下，零耗散响应会出现死点，这预示着物理传感中的潜力，例如磁场和温度的精确测量。然后探索强耗散声光相互作用用于宽带声波的超灵敏检测。实验证明，空气中 140 kHz 时的噪声等效压力低至 0.81 Pa，对空腔不敏感$问$因素并且不依赖于机械共振。