发表机构
Johannes Kepler University Linz; Indian Institute of Technology Delhi; Instituto de Física Gleb Wataghin, Universidade（林茨约翰内斯·开普勒大学; 德里印度理工学院; 格列布·瓦塔金物理研究所，大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究实验展示了平面金属-半导体Yagi-Uda型天线，通过金属反射层和引向层提高量子点光提取效率，并支持电调谐和应变调谐，为固态量子光子器件提供可扩展平台。
AI 中文摘要
可调谐光子架构能够提高嵌入外延量子点在宽光谱范围内的光提取效率，是开发明亮单光子和不可区分光子源的关键推动因素。在本研究中，我们实验演示了平面多层天线结构，该结构由外延生长的AlGaAs和InGaAs膜组成，其中包含量子点，夹在金属Au（或Ag）反射层和引向层之间，并带有Al$_2$O$_3$间隔层。我们表明，中性激子发射的线宽和精细结构分裂与相应未处理样品中测量的值相当，证明制造过程保持了发射器的光学质量。除了宽带操作外，我们还证明了该平面架构与通过集成二极管结构进行电调谐以及使用压电致动器进行应变调谐兼容。尽管超薄金属层中的光学损耗存在局限性，但所展示的制造简单性、可扩展性以及与可调谐量子发射器的兼容性，使平面天线成为固态量子光子器件的一个有前景的平台。
英文摘要
Tunable photonic architectures that improve the extraction efficiency of light from embedded epitaxial quantum dots across a wide spectral range are key enablers for developing bright sources of single and indistinguishable photons. In this study, we experimentally demonstrate planar multilayer antenna structures consisting of epitaxially grown AlGaAs and InGaAs membranes containing quantum dots sandwiched between metallic Au (or Ag) reflector and director layers together with Al$_2$O$_3$ spacer layers. We show that the linewidths and fine-structure splitting of the neutral exciton emission remain comparable to those measured in the corresponding unprocessed samples, demonstrating that the fabrication process preserves the optical quality of the emitters. In addition to broadband operation, we demonstrate that the planar architecture is compatible with electrical tuning via integrated diode structures, and strain tuning using piezoelectric actuators. In spite of limitations related to optical losses in the ultrathin metallic layers, the demonstrated fabrication simplicity, scalability, and compatibility with tunable quantum emitters establish planar antennas as a promising platform for solid-state quantum photonic devices.
