Low temperature photo-physics of single NV centers in diamond

Abstract

We investigate the magnetic field dependent photo-physics of individual Nitrogen-Vacancy (NV) color centers in diamond under cryogenic conditions. At distinct magnetic fields, we observe significant reductions in the NV photoluminescence rate, which indicate a marked decrease in the optical readout efficiency of the NV's ground state spin. We assign these dips to excited state level anti-crossings, which occur at magnetic fields that strongly depend on the effective, local strain environment of the NV center. Our results offer new insights into the structure of the NVs' excited states and a new tool for their effective characterization. Using this tool, we observe strong indications for strain-dependent variations of the NV's orbital g-factor, obtain new insights into NV charge state dynamics, and draw important conclusions regarding the applicability of NV centers for low-temperature quantum sensing.

5 pages, 4 figures plus Supplementary Material. Questions and comments are welcome

References in corpus (10)

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• Probing magnetism in 2D materials at the nanoscale with single spin microscopy
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• Photonic nano-structures on (111) oriented diamond
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• Temperature Dependent Photophysics of Single NV Centers in Diamond
• Temperature dependence of photoluminescence intensity and spin contrast in nitrogen-vacancy centers
• Modeling temperature-dependent population dynamics in the excited state of the nitrogen-vacancy center in diamond
• Identifying the Origin of Thermal Modulation of Exchange Bias in MnPS3/Fe3GeTe2 van der Waals Heterostructures
• Na in Diamond: High Spin Defects Revealed by the ADAQ High-Throughput Computational Database