结构化腔量子电动力学
Structured Cavity Quantum Electrodynamics
AI总结：
研究半导体腔量子电动力学系统中结构化光与物质相互作用，通过构建特定腔模式，定位量子点并调谐波长，实现了具有自旋锁定手性OAM和可工程化自旋轨道纠缠的腔增强单光子发射，开启新范式推动相关技术发展。
AI中文摘要：
由受限单光子和单量子发射器组成的腔量子电动力学（cQED）系统是量子光学和光子量子技术的基本模块。传统腔量子电动力学中使用的规范光学模式具有均匀的偏振分布，导致大多数现有实验中的标量光与物质相互作用。尽管在产生具有空间变化偏振的结构化光方面取得了快速进展，但结构化光与物质的相互作用，特别是在单量子水平上，仍然极具吸引力且很大程度上未被探索。在此，我们展示了半导体腔量子电动力学系统中单光子水平的结构化光与物质相互作用。在微柱腔中构建了四个光谱上彼此接近的不同结构化腔模式。通过在半导体微柱腔的周边空间定位单个外延量子点（QD），并将QD发射波长光谱调谐到结构化腔模式的共振中，在单个波长尺度的器件内实现了具有自旋锁定手性轨道角动量（OAM）和可工程化自旋轨道纠缠的腔增强单光子发射。我们的工作开启了结构化量子光与物质相互作用的未探索范式，并可能进一步推动手性量子光学和高维光子量子技术的发展。
英文摘要：
A cavity quantum electrodynamics (cQED) system consisting of a confined single photon and a single quantum emitter serves as a fundamental block for quantum optics and photonic quantum technologies. The canonical optical mode employed in the conventional cavity quantum electrodynamics features a uniform polarization distribution, leading to the scalar light-matter interaction in most existing experiments. Despite the rapid progress in the generation of structured light with spatially varied polarizations, the structured light-matter interaction, especially at the single quanta level, is highly intriguing yet largely unexplored. Here, we present the structured light-matter interaction at the single-photon level in a semiconductor cavity quantum electrodynamics system. Four distinct structured cavity modes that are spectrally close to each other are constructed in a micropillar cavity. By spatially locating a single epitaxial quantum dot (QD) at the periphery of a semiconductor micropillar cavity and spectrally tuning the QD emission wavelength into the resonances of the structured cavity modes, cavity-enhanced single-photon emissions with spin-locked chiral orbital angular momentum (OAM) and engineerable spin-orbit entanglements are achieved within a single wavelength-scale device. Our work opens an unexplored paradigm of structured quantum light-matter interactions and may further advance chiral quantum optics and high-dimensional photonic quantum technology.
