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arXiv · 2308.09325

Vector detection of AC magnetic fields by Nitrogen-Vacancy centers of single orientation in diamond

Pooja Lamba·Akshat Rana·Sougata Halder·Siddharth Dhomkar·Dieter Suter·Rama K. Kamineni
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Abstract

Nitrogen-Vacancy (NV) centers in diamond have useful properties for detecting both AC and DC magnetic fields with high sensitivity at nano-scale resolution. Vector detection of AC magnetic fields can be achieved by using NV centers having three different orientations. Here, we propose a method to achieve this by using NV centers of single orientation. In this method, a static magnetic field is applied perpendicular to the NV axis, leading to strong mixing of the $m_{s}=-1$ and $1$ electron spin states. As a result, all three electron spin transitions of the triplet ground state have non-zero dipole moments, with each transition coupling to a single component of the magnetic field. This can be used to measure both strength and orientation of the applied AC field. To validate the technique, we perform a proof of principle experiment using a subset of ensemble NV centers in diamond, all having the same orientation.

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Pooja Lamba, Akshat Rana, Sougata Halder, Siddharth Dhomkar, Dieter Suter, Rama K. Kamineni. 2023-08-18. Vector detection of AC magnetic fields by Nitrogen-Vacancy centers of single orientation in diamond. https://doi.org/10.1103/physrevb.109.195424

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