Fischbach Sarah, Schlehahn Alexander, Thoma Alexander, Srocka Nicole, Gissibl Timo, Ristok Simon, Thiele Simon, Kaganskiy Arsenty, Strittmatter André, Heindel Tobias, Rodt Sven, Herkommer Alois, Giessen Harald, Reitzenstein Stephan
Institute of Solid State Physics, Technische Universität Berlin, Hardenbergstraße 36, 10623 Berlin, Germany.
4th Physics Institute and Research Center SCoPE and Institute for Applied Optics and Research Center SCoPE, University of Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart, Germany.
ACS Photonics. 2017 Jun 21;4(6):1327-1332. doi: 10.1021/acsphotonics.7b00253. Epub 2017 May 31.
Integrated single-photon sources with high photon-extraction efficiency are key building blocks for applications in the field of quantum communications. We report on a bright single-photon source realized by on-chip integration of a deterministic quantum dot microlens with a 3D-printed multilens micro-objective. The device concept benefits from a sophisticated combination of in situ 3D electron-beam lithography to realize the quantum dot microlens and 3D femtosecond direct laser writing for creation of the micro-objective. In this way, we obtain a high-quality quantum device with broadband photon-extraction efficiency of (40 ± 4)% and high suppression of multiphoton emission events with (τ = 0) < 0.02. Our results highlight the opportunities that arise from tailoring the optical properties of quantum emitters using integrated optics with high potential for the further development of plug-and-play fiber-coupled single-photon sources.
具有高光子提取效率的集成单光子源是量子通信领域应用的关键组成部分。我们报告了一种明亮的单光子源，它是通过将确定性量子点微透镜与3D打印多透镜微物镜进行片上集成而实现的。该器件概念受益于原位3D电子束光刻技术与3D飞秒直接激光写入技术的复杂结合，前者用于实现量子点微透镜，后者用于制造微物镜。通过这种方式，我们获得了一种高质量的量子器件，其宽带光子提取效率为(40±4)%，并且对多光子发射事件具有高抑制能力，(τ = 0) < 0.02。我们的结果突出了利用集成光学定制量子发射器光学特性所带来的机遇，这对于即插即用光纤耦合单光子源的进一步发展具有很高的潜力。
