Identification and Reversible Optical Switching of NV+ Centers in Diamond

IF 18.5 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Advanced Functional Materials Pub Date : 2025-03-30 DOI:10.1002/adfm.202500817

Marcel Dickmann, Lucian Mathes, Ricardo Helm, Vassily Vadimovitch Burwitz, Werner Egger, Johannes Mitteneder, Christoph Hugenschmidt, Peter Sperr, Maik Butterling, Maciej Oskar Liedke, Andreas Wagner, Joachim Dorner, Thomas Schwarz-Selinger, Günther Dollinger

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引用次数: 0

Abstract

Positive nitrogen-vacancy centers (NV⁺) in diamond are predicted to exist in conjunction with neutral (NV⁰) and negative (NV⁻) centers. However, the existence of NV⁺ has only been indirectly inferred through a shift of the Fermi level. Evidence of NV⁺ coexisting with NV⁰ and NV^– in diamond has not yet been observed. In this paper, positron annihilation spectroscopy in combination with in situ light illumination is applied, in order to investigate the presence of NV⁺ centers in nitrogen implanted and subsequently annealed diamond. Switching of NV⁺ to NV⁰ centers is observed with a threshold photon energy of 1.234(8) eV. In complete darkness, a decay of NV⁰ centers with a decay time of 1.73(22) h can be detected. In conclusion, previously converted NV⁰ centers are metastable and partially decay in darkness, leading to the reformation of NV⁺ centers.

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来源期刊

Advanced Functional Materials 工程技术-材料科学：综合

CiteScore

29.50

自引率

4.20%

发文量

2086

审稿时长

2.1 months

期刊介绍： Firmly established as a top-tier materials science journal, Advanced Functional Materials reports breakthrough research in all aspects of materials science, including nanotechnology, chemistry, physics, and biology every week. Advanced Functional Materials is known for its rapid and fair peer review, quality content, and high impact, making it the first choice of the international materials science community.