AI 中文总结
研究旨在解决无机卤化物钙钛矿纳米晶体集成难题，通过热扫描探针方法实现单个钙钛矿量子点的直接写入，获得高产率、高性能的单光子发射器阵列，实现其与光子腔精确耦合，为下一代量子技术开辟新策略。
AI 中文摘要
能够产生单光子的量子光源是光子量子技术的基本构建模块。在寻找理想量子发射器的过程中，无机卤化物钙钛矿纳米晶体成为有前景的单光子源。但其在溶液中的随机分散给实际技术所需的单个发射器与光子结构的确定性和稳定集成带来挑战。传统自上而下制造工艺不足。本文报告了具有单发射器分辨率的钙钛矿量子点的直接写入。通过热扫描探针方法实现位点选择性合成，获得具有光谱可调性和<25nm空间控制的单原子尺度量子点。展示了室温下窄线宽、高达98%单光子纯度的高产率CsPbI3单光子发射器阵列。实现了发射器与光子腔的精确按需耦合，为解决这些材料长期存在的集成障碍取得关键进展，开启了新的发射器工程策略。
英文摘要
Quantum light sources capable of generating single photons are fundamental building blocks for photonic quantum technologies. In the ongoing search for an ideal quantum emitter, inorganic halide perovskite nanocrystals have emerged as a promising source of single photons. Their unique optical response, with an unmatched ease of synthetic tunability, stands out amongst the competing platforms. However, their stochastic dispersion in solution challenges the deterministic and stable integration of individual emitters with photonic structures that is required for practical technologies. Notably, resolution and material compatibility constraints make conventional top-down fabrication processes insufficient for such heterogeneous integration. Here, we report direct writing of perovskite quantum dots (QDs) with individual-emitter resolution. By inducing a nanoscale-confined formation volume using a thermal scanning probe method, we achieve site-selective synthesis down to a single atomic-scale QD with spectral tunability and < 25 nm spatial control. As a result, we demonstrate high-yield arrays of CsPbI3 single-photon emitters with narrow linewidths and high single-photon purity up to 98% at room temperature, performance consistent with that of their state-of-the-art colloidal counterparts. Through such deterministic control, we uniquely realize the precise, on-demand coupling of these emitters to photonic cavities, as evidenced by a measured enhancement in the spontaneous emission rate. This represents a key advancement toward addressing the longstanding integration obstacles of these materials. Overall, by combining the atomic-scale tunability of chemical synthesis with the spatial control of additive manufacturing, our work opens new emitter engineering strategies to realize the untapped potential of colloidal materials for next-generation quantum technologies.
Comments13 pages, 4 figures
