Optomechanical systems have long been considered in the field of precision measurement. In this work, measurement of weak magnetic field in a hybrid optomechanical system is discussed. In contrast to conventional measurements based on detecting the change of magnetic flux, our scheme presents an alternative way to measure the magnetic field with a precision of 0.1 nT. We show that the effective cavity resonance frequency will be revised due to the electromagnetic interactions. Therefore, a resonance valley in the transmission spectrum of the probe field will shift in the presence of the magnetic field, and the width of an asymmetric transparency in the optomechanically induced transparency (OMIT) shows a strong dependence on the magnetic field strength. Our results may have potential application for achieving high precision measurement of the magnetic field.

中文翻译：

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提出了一种基于混合光机械系统的弱磁场测量方法。

在精密测量领域，光机械系统早已被考虑。在这项工作中，讨论了混合光机械系统中弱磁场的测量。与基于检测磁通量变化的常规测量方法相比，我们的方案提出了另一种方法来以0.1 nT的精度测量磁场。我们表明，由于电磁相互作用，有效腔谐振频率将被修改。因此，在磁场的存在下，探测场的透射谱中的共振谷将移动，并且光机械感应透明性（OMIT）中不对称透明性的宽度强烈依赖于磁场强度。