Addressing a single NV$^{-}$ spin with a macroscopic dielectric microwave cavity

TL;DR

This paper introduces a method to control and detect single NV$^{-}$ center spins in diamond using a tunable macroscopic dielectric microwave cavity, enabling spatial mapping and potential orientation determination.

Contribution

It presents a novel approach for addressing single NV$^{-}$ spins over large distances with a tunable dielectric cavity, including spatial mapping of the magnetic field.

Findings

Successful ODMR detection of a single NV$^{-}$ in nanodiamond under the cavity

Mapping of the cavity magnetic field distribution along one axis

Potential for straightforward NV axis orientation determination

Abstract

We present a technique for addressing single NV$^{-}$ center spins in diamond over macroscopic distances using a tunable dielectric microwave cavity. We demonstrate optically detected magnetic resonance (ODMR) for a single NV$^{-}$ center in a nanodiamond (ND) located directly under the macroscopic microwave cavity. By moving the cavity relative to the ND, we record the ODMR signal as a function of position, mapping out the distribution of the cavity magnetic field along one axis. In addition, we argue that our system could be used to determine the orientation of the NV$^{-}$ major axis in a straightforward manner.