纳米金刚石中NV色心的产生、调控与建模
Creation, Control, and Modeling of NV Centers in Nanodiamonds
AI总结：
本文通过表面化学调控和质子束辐照优化纳米金刚石中NV色心的光学性质与浓度，并建立可预测离子束产生色心效率的数学模型，为金刚石色心工程提供了通用工具。
摘要：
基于纳米金刚石（NDs）中氮-空位（NV）色心的传感技术在多种应用中展现出巨大潜力，然而优化其量子光学性质仍具挑战性。本研究聚焦于通过表面化学调控和质子束辐照来增强并控制NDs中NV色心的光学性质。我们进行了系统的热氧化处理，利用红外光谱研究表面化学基团的演变，并通过光致发光光谱和光致发光衰减测量研究其对光学性质的影响。在10^14至10^17 cm^-2的宽泛注量范围内探索了质子辐照，以精确控制NV色心浓度，确定了使色心产生量和发射强度最大化的条件。此外，通过分析不同表面终端和NV色心浓度下的NV-/NV0比率，实现了NV色心电荷态的控制。我们开发了一种新型预测数学模型，用于评估形成NV-和NV0的效率。尽管该模型专门针对质子辐照的NDs进行了测试，但具有广泛的适用性，代表了在预测金刚石中基于离子束的色心生成结果方面的重大进展。
英文摘要：
Sensing based on Nitrogen-Vacancy (NV) centers in nanodiamonds (NDs) offers significant potential across various applications. However, optimizing their quantum-optical properties remains challenging. This study focuses on enhancing and controlling the optical properties of NV centers in NDs through surface chemistry tuning and proton beam irradiation. Systematic thermal oxidations were performed to investigate the evolution of surface chemical groups using IR spectroscopy and their influence on optical properties using photoluminescence spectroscopy and PL decay measurements. Proton irradiation was explored over a wide range of fluences (10^14 to 10^17 cm^-2) to precisely control the NV center concentration, identifying conditions that maximize creation and emission intensity. Furthermore, NV center charge state control was achieved by analyzing the NV-/NV0 ratio with varying surface terminations and NV center concentrations. A novel predictive mathematical model was developed to evaluate the efficiencies of forming NV- and NV0. Although tested specifically with proton-irradiated NDs, this model has broad applicability, representing a significant advancement in predicting the outcomes of ion-beam-based color center generation in diamond.
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