Temperature dependence of photoluminescence intensity and spin contrast in nitrogen-vacancy centers

• URL: http://arxiv.org/abs/2301.05091v2
• Date: Thu, 31 Aug 2023 14:03:24 GMT
• Title: Temperature dependence of photoluminescence intensity and spin contrast in nitrogen-vacancy centers
• Authors: Stefan Ernst, Patrick J. Scheidegger, Simon Diesch, Luca Lorenzelli, Christian L. Degen
• Abstract summary: We report on measurements of the photoluminescence (PL) properties of single nitrogen-vacancy (NV) centers in diamond at temperatures between 4-300 K. We observe a strong reduction of the PL intensity and spin contrast between ca. 10-100 K that recovers to high levels below and above. We develop a comprehensive model based on spin mixing and orbital hopping in the electronic excited state that quantitatively explains the observations.
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• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We report on measurements of the photoluminescence (PL) properties of single nitrogen-vacancy (NV) centers in diamond at temperatures between 4-300 K. We observe a strong reduction of the PL intensity and spin contrast between ca. 10-100 K that recovers to high levels below and above. Further, we find a rich dependence on magnetic bias field and crystal strain. We develop a comprehensive model based on spin mixing and orbital hopping in the electronic excited state that quantitatively explains the observations. Beyond a more complete understanding of the excited-state dynamics, our work provides a novel approach for probing electron-phonon interactions and a predictive tool for optimizing experimental conditions for quantum applications.

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