Abstract Hybrid quantum photonics combines classical photonics with quantum emitters in a postprocessing step. It facilitates to link ideal quantum light sources to optimized photonic platforms. Optical cavities enable to harness the Purcell-effect boosting the device efficiency. Here, we postprocess a free-standing, crossed-waveguide photonic crystal cavity based on Si3N4 with SiV− center in nanodiamonds. We develop a routine that optimizes the overlap with the cavity electric field utilizing atomic force microscope (AFM) nanomanipulation to attain control of spatial and dipole alignment. Temperature tuning further gives access to the spectral emitter-cavity overlap. After a few optimization cycles, we resolve the fine-structure of individual SiV− centers and achieve a Purcell enhancement of more than 4 on individual optical transitions, meaning that four out of five spontaneously emitted photons are channeled into the photonic device. Our work opens up new avenues to construct efficient quantum photonic devices.

中文翻译：

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纳米金刚石中单个 SiV− 中心的 Purcell 增强发射，耦合到基于 Si3N4 的光子晶体腔

摘要 混合量子光子学在后处理步骤中将经典光子学与量子发射器相结合。它有助于将理想的量子光源连接到优化的光子平台。光腔能够利用珀塞尔效应提高设备效率。在这里，我们对基于 Si3N4 的独立、交叉波导光子晶体腔进行后处理，在纳米金刚石中具有 SiV− 中心。我们开发了一个程序，利用原子力显微镜 (AFM) 纳米操作优化与腔电场的重叠，以控制空间和偶极子对齐。温度调谐进一步提供了对光谱发射器-腔重叠的访问。经过几个优化周期后，我们解析了单个 SiV− 中心的精细结构，并在单个光学跃迁上实现了超过 4 的 Purcell 增强，这意味着五分之四的自发发射光子被引导到光子设备中。我们的工作开辟了构建高效量子光子器件的新途径。