Optically detected flip-flops between different spin ensembles in diamond

TL;DR

This paper uses optical detection of magnetic resonance to study spin interactions and flip-flops in diamond, revealing insights into spin dynamics and strain coupling that could enhance diamond-based sensor sensitivity.

Contribution

It demonstrates optical measurement of spin flip-flops between different ensembles and explores strain coupling in diamond, advancing understanding of spin interactions.

Findings

Optical detection of resonant spin flip-flops in diamond.

Observation of strain coupling between NV centers and acoustic modes.

Potential to improve diamond-based sensor sensitivity.

Abstract

We employ the technique of optical detection of magnetic resonance to study dipolar interaction in diamond between nitrogen-vacancy color centers of different crystallographic orientations and substitutional nitrogen defects. We demonstrate optical measurements of resonant spin flips-flips (second Larmor line), and flip-flops between different spin ensembles in diamond. In addition, the strain coupling between the nitrogen-vacancy color centers and bulk acoustic modes is studied using optical detection. Our findings may help optimizing cross polarization protocols, which, in turn, may allow improving the sensitivity of diamond-based detectors.