Identification and Reversible Optical Switching of NV+ Centers in Diamond

IF 19 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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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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金刚石中NV+中心的识别与可逆光交换

金刚石中的正氮空位中心（NV+）与中性空位中心（NV0）和负电荷空位中心（NV−）共同存在。然而，NV+的存在只是通过费米能级的移动间接推断出来的。在金刚石中还没有观察到NV+与NV0和NV -共存的证据。本文采用正电子湮没光谱法结合原位光照射，研究了氮注入和退火后金刚石中NV+中心的存在。在阈值光子能量为1.234(8)eV时，观察到NV+中心向NV0中心的转换。在完全黑暗条件下，可以检测到NV0中心的衰变，衰变时间为1.73(22)h。综上所述，先前转换的NV0中心是亚稳态的，并且在黑暗中部分衰变，导致NV+中心的重组。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.