Dispersive readout with two orthogonal modes of a dielectric cavity

TL;DR

This paper proposes an improved dispersive readout scheme using two orthogonal modes of a dielectric cavity to enhance the sensitivity of NV center-based magnetometers.

Contribution

It introduces a two-channel dispersive readout method with dielectric cavities, advancing NV magnetometry sensitivity.

Findings

Two-channel scheme significantly improves dispersive readout sensitivity.

Demonstrated potential for enhanced magnetic field measurement accuracy.

Proposed method offers a new approach for NV center magnetometry.

Abstract

Nitrogen-vacancy color centers in diamond have proven themselves as a good, sensitive element for the measurement of magnetic fields. While the mainstream of magnetometers based on NV centers uses so-called optically detected magnetic resonance, there has recently been a suggestion to use dispersive readout of a dielectric cavity to enhance the sensitivity of magnetometers. Here, we demonstrate that the dispersive readout approach can be significantly improved if a two-channel scheme is considered.