Abstract
Abstract
We present high-resolution optically detected magnetic resonance spectroscopy on single nitrogen-vacancy (NV) center spins in diamond at and around zero magnetic field. The experimentally observed transitions depend sensitively on the interplay between the microwave (MW) probing field and the local intrinsic effective field comprising strain and electric fields, which act on the NV spin. Based on a theoretical model of the magnetic dipole transitions and the MW driving field, we extract both the strength and the direction of the transverse component of the effective field. Our results reveal that for the diamond crystal under study, strain is the dominant contribution to the effective field. Our experiments further yield a method for MW polarization analysis in a tunable, linear basis, which we demonstrate on a single NV spin. Our results are of importance to low-field quantum sensing applications using NV spins and form a relevant addition to the ever-growing toolset of spin-based quantum sensing.
Funder
Schweizerischer Nationalfonds zur F??rderung der Wissenschaftlichen Forschung
EU Quantum Flagship project ASTERIQS
Swiss Nanoscience Institute
NCCR QSIT
Subject
General Physics and Astronomy
Cited by
7 articles.
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