纳米束与量子点耦合产生的单光子非线性

中文摘要 AI 辅助

高效的单光子非线性是光子量子技术的关键资源。单光子非线性已在多种腔体和波导几何结构中通过量子点（QD）得到验证。然而，这些实现均未能同时提供高效直接光纤耦合和与可扩展片上集成的兼容性。纳米束腔体通过其面内几何结构解决了这些限制，实现了高效直接光纤耦合，同时支持可扩展的同质和异质片上集成。在此，我们报道了与单个量子点耦合的纳米束腔体产生的单光子非线性。该纳米束直接与单模光纤接口，效率为60%。在共振皮秒脉冲驱动下，该平台实现了单光子非线性，阈值低至每脉冲0.24个入射光子。系统工作在强耦合区域，耦合速率g/2π = 29.1 GHz，协同度C = 3.98。这些结果确立了纳米束腔-QD系统作为紧凑、可芯片集成且光纤兼容的构建模块，适用于可扩展的光子量子技术。

英文摘要

An efficient single-photon nonlinearity is a key resource for photonic quantum technologies. Single-photon nonlinearities have been demonstrated with quantum dots (QDs) across a range of cavity and waveguide geometries. However, none of these realizations simultaneously provide high-efficiency direct fiber coupling and compatibility with scalable on-chip integration. The nanobeam cavity addresses these limitations through its in-plane geometry, which enables highly efficient, direct fiber coupling alongside scalable homogeneous and heterogeneous on-chip integration. Here, we report a single-photon nonlinearity from a nanobeam cavity coupled to a single quantum dot. The nanobeam interfaces directly with a single-mode fiber with an efficiency of 60%. Driven by resonant picosecond pulses, the platform achieves a single-photon nonlinearity with a low threshold of 0.24 incident photons per pulse. The system operates in the strong-coupling regime, exhibiting a coupling rate of g/2π = 29.1 GHz and a cooperativity of C = 3.98. These results establish the nanobeam cavity-QD system as a compact, chip-integrable, and fiber-compatible building block for scalable photonic quantum technologies.

发表机构

• University of Maryland（马里兰大学）
• Naval Research Laboratory（海军研究实验室）

机构由 AI 辅助整理，请以论文原文为准。