Highly Sensitive On-Chip Magnetometer with Saturable Absorbers in Two-Color Microcavities

Abstract

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.

References in corpus (7)

• High-sensitivity diamond magnetometer with nanoscale resolution
• Strongly enhanced photon collection from diamond defect centres under micro-fabricated integrated solid immersion lenses
• Optical properties of the nitrogen-vacancy singlet levels in diamond
• New infrared emission of the NV centre in diamond: Zeeman and uniaxial stress studies
• Broadband magnetometry by infrared-absorption detection of nitrogen-vacancy ensembles in diamond
• Cavity-enhanced room-temperature magnetometry using absorption by nitrogen-vacancy centers in diamond
• Integrated Diamond Optics for Single Photon Detection

Cited by in corpus (4)

• Diamond photonics platform enabled by femtosecond laser writing
• Integrated waveguides and deterministically positioned nitrogen vacancy centers in diamond created by femtosecond laser writing
• Femtosecond laser inscription of Bragg grating waveguides in bulk diamond
• Infrared laser magnetometry with a NV doped diamond intracavity etalon