双色微腔可饱和吸收体高灵敏度片上磁强计
Highly Sensitive On-Chip Magnetometer with Saturable Absorbers in Two-Color Microcavities
摘要：
相互作用的谐振器可以导致强非线性，但细节可能很难预测。在这项工作中，我们研究了两个嵌套的微腔，与氮空位中心在金刚石波导中的相互作用所引入的非线性。每个腔都有不同设计的共振;一个在绿色，一个在红外线。氮空位中心吸收率对绿色和最近观察到的红外跃迁的磁场依赖性使我们能够提出一种可扩展的片上磁强计，它结合了高磁场灵敏度和微米空间分辨率。通过研究系统的行为在几个内部和外部参数，我们解释了主要的非线性引起的NV中心和增强的腔。我们最后表明，腔可以提高磁场灵敏度高达两个数量级。
英文摘要：
Interacting resonators can lead to strong non-linearities but the details can be complicated to predict. In this work, we study the non-linearities introduced by two nested microcavities that interact with nitrogen vacancy centers in a diamond waveguide. Each cavity has differently designed resonance; one in the green and one in the infrared. The magnetic-field dependence of the nitrogen vacancy center absorption rates on the green and the recently observed infrared transitions allows us to propose a scalable on-chip magnetometer that combines high magnetic-field sensitivity and micrometer spatial resolution. By investigating the system behaviors over several intrinsic and extrinsic parameters, we explain the main non-linearities induced by the NV centers and enhanced by the cavities. We finally show that the cavities can improve the magnetic-field sensitivity by up to two orders of magnitudes.
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