The resonant enhancement of both mechanical and optical response in microcavity optomechanical devices allows exquisitely sensitive measurements of stimuli, such as acceleration, mass, and magnetic fields. In this work, we show that quantum correlated light can improve the performance of such sensors, increasing both their sensitivity and their bandwidth. Specifically, we develop a silicon-chip-based cavity optomechanical magnetometer that incorporates phase squeezed light to suppress optical shot noise. At frequencies where shot noise is the dominant noise source, this allows a 20% improvement in magnetic field sensitivity. Furthermore, squeezed light broadens the range of frequencies at which thermal noise dominates, which has the effect of increasing the overall sensor bandwidth by 50%. These proof-of-principle results open the door to apply quantum correlated light more broadly in chip-scale sensors and devices.

中文翻译：

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量子增强光机磁法

微腔光机械设备中机械和光学响应的​​共振增强使得可以对刺激进行非常灵敏的测量，例如加速度，质量和磁场。在这项工作中，我们证明了量子相关的光可以提高此类传感器的性能，同时提高其灵敏度和带宽。具体来说，我们开发了一种基于硅芯片的腔室光机械磁力仪，该仪器集成了相位压缩光以抑制光学散粒噪声。在散粒噪声为主要噪声源的频率上，这可使磁场灵敏度提高20％。此外，压缩光扩大了热噪声占主导的频率范围，这具有将整个传感器带宽增加50％的效果。