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.
@article{arxiv.2103.08994,
title = {Optically detected flip-flops between different spin ensembles in diamond},
author = {Sergei Masis and Sergey Hazanov and Nir Alfasi and Oleg Shtempluck and Eyal Buks},
journal= {arXiv preprint arXiv:2103.08994},
year = {2021}
}