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首页> 外文期刊>Nature photonics >Non-resonant dot-cavity coupling and its potential for resonant single-quantum-dot spectroscopy
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Non-resonant dot-cavity coupling and its potential for resonant single-quantum-dot spectroscopy

机译：非共振点腔耦合及其在共振单量子点光谱学中的潜力

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摘要

Non-resonant emitter-cavity coupling is a fascinating effect recently observed as unexpected pronounced cavity resonance emission even in strongly detuned single quantum dot-microcavity systems(1-3). This phenomenon indicates strong, complex light-matter interactions in these solid-state systems, and has major implications for single-photon sources(4-6) and quantum information applications(1-3,7,9). We study non-resonant dot-cavity coupling of individual quantum dots in micropillars under resonant excitation, revealing a pronounced effect over positive and negative quantum dot mode detunings. Our results suggest a dominant role of phonon-mediated dephasing in dot-cavity coupling, giving a new perspective to the controversial discussions ongoing in the literature. Such enhanced insight is essential for various cavity-based quantum electrodynamic systems using emitters that experience phonon coupling, such as colour centres in diamond(10) and colloidal nanocrystals(11). Non-resonant coupling is demonstrated to be a versatile 'monitoring' tool for observing relevant quantum dot s-shell emission properties and background-free photon statistics.
机译：最近，即使在强烈失谐的单量子点-微腔系统中，非共振发射极-腔耦合也是令人着迷的意外共振腔共振发射（1-3）。这种现象表明在这些固态系统中存在强而复杂的光-物质相互作用，并且对单光子源（4-6）和量子信息应用（1-3,7,9）具有重要意义。我们研究了共振激发下微柱中单个量子点的非共振点-腔耦合，揭示了在正负量子点模式失谐过程中的明显影响。我们的结果表明，声子介导的相移在点-腔耦合中起着主导作用，为文献中有争议的讨论提供了新的视角。这种增强的洞察力对于使用经历声子耦合的发射器（例如钻石（10）和胶体纳米晶体（11）中的色心）的各种基于腔的量子电动系统至关重要。非共振耦合被证明是一种多功能的“监测”工具，用于观察相关的量子点s壳发射特性和无背景光子统计数据。

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