Near zero-field microwave-free magnetometry with ensembles of nitrogen-vacancy centers in diamond

Omkar Dhungel; Till Lenz; Muhib Omar; Joseph Shaji Rebeirro; Minh-Tuan Luu; Ali Tayefeh Younesi; Ronald Ulbricht; Viktor Ivady; Adam Gali; Arne Wickenbrock; Dmitry Budker

arXiv · 2301.09666

Near zero-field microwave-free magnetometry with ensembles of nitrogen-vacancy centers in diamond

Omkar Dhungel·Till Lenz·Muhib Omar·Joseph Shaji Rebeirro·Minh-Tuan Luu·Ali Tayefeh Younesi·Ronald Ulbricht·Viktor Ivady·Adam Gali·Arne Wickenbrock·Dmitry Budker

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Abstract

We study cross-relaxation features near zero magnetic field with ensembles of nitrogen-vacancy (NV) centers in diamond and examine their properties in samples with a range (0.9 ppm - 16.0 ppm) of NV concentrations. The observed NV-NV cross-relaxation features between differently oriented NV centers in high (greater than 0.9 ppm)-NV-density samples hold promise for a variety of magnetometry applications where microwave fields (or any bias field) disturb the system under study. We theoretically determine the values of the bias magnetic fields corresponding to cross-relaxations between different axes and experimentally validate them. The behavior of zero-field cross-relaxation features as a function of temperature is also investigated.

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Omkar Dhungel, Till Lenz, Muhib Omar, Joseph Shaji Rebeirro, Minh-Tuan Luu, Ali Tayefeh Younesi, Ronald Ulbricht, Viktor Ivady, Adam Gali, Arne Wickenbrock, Dmitry Budker. 2023-01-23. Near zero-field microwave-free magnetometry with ensembles of nitrogen-vacancy centers in diamond. https://arxiv.org/abs/2301.09666

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