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arXiv 2104.04746physics.opticsquant-ph
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金刚石中单个TR12中心的光探测磁共振研究

ODMR on Single TR12 Centers in Diamond

Jonas Foglszinger, Andrej Denisenko, Thomas Kornher, Matthias Schreck, Wolfgang Knolle, Boris Yavkin, Roman Kolesov, Jörg Wrachtrup

AI总结:

本文在室温下对金刚石中单个TR12中心进行光探测磁共振研究,提出其能级结构并确定十二个不等价取向,同时观测到静态Jahn-Teller效应,为量子传感和量子信息处理应用奠定基础。

摘要:

绝缘体中的点缺陷被认为是量子技术的有前景候选者。与此一致,我们展示了一项在室温下对单个TR12中心(零声子线位于471nm)进行的广泛光探测磁共振(ODMR)研究,这些中心自1956年以来已为文献所知。在这项工作中,我们发现TR12中心在光学饱和条件下表现出强烈的ODMR信号。这些观测到的缺陷是通过标准辐照和退火工艺在高纯度金刚石外延层中产生的。通过对ODMR光谱以及反聚束测量和相干布居俘获的分析,我们提出了TR12中心的能级结构,该结构由基态单重态和激发态单重态组成,中间辅以一个亚稳态三重态。通过绘制该中心荧光对外部磁场和激光激发偏振的依赖关系,我们能够确定TR12中心的十二个不等价取向。这包括偶极跃迁和三重态轴在金刚石晶格中的精确取向,与基于所提能级结构的建模结果完全一致。此外,在低光学激发功率下,通过两个能级之间的荧光切换检测到静态Jahn-Teller效应,该效应可在不同激光激发偏振下的实时荧光信号中直接观测到。基于这些结果,我们讨论了金刚石中TR12中心在量子传感和量子信息处理中的应用前景。

英文摘要:

Point defects in insulators are considered promising candidates for quantum technologies. In keeping with this, we present an extensive optically-detected magnetic resonance (ODMR) study at room-temperature on individual TR12 centers (ZPL at 471nm), which are known in the literature since 1956. In this work we found TR12 centers to show a strong ODMR signal under optical saturation. These observed defects were created in high-purity epitaxial layers of diamond by standard irradiation and annealing processes. From the analysis of the ODMR spectra along with antibunching measurements and coherent population trapping, we proposed the energy level structure of TR12 center, consisting of ground state and excited state singlets complemented by a metastable triplet in between. Mapping the fluorescence dependence of the center on an external magnetic field and on the polarization of laser excitation, allows us to identify twelve inequivalent orientations for TR12 centers. This includes the exact orientations of the dipole transition and the triplet axes in the diamond lattice in full agreement with the results of modeling based on the proposed level structure. Furthermore, a static Jahn-Teller effect was detected through fluorescence switching between two levels at low optical excitation power, directly observable in the real-time fluorescence signal for various polarization of laser excitation. Based on these results we discuss the prospects of the TR12 center in diamond for quantum sensing and quantum information processing.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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