Holewa Paweł, Vajner Daniel A, Zięba-Ostój Emilia, Wasiluk Maja, Gaál Benedek, Sakanas Aurimas, Burakowski Marek, Mrowiński Paweł, Krajnik Bartosz, Xiong Meng, Yvind Kresten, Gregersen Niels, Musiał Anna, Huck Alexander, Heindel Tobias, Syperek Marcin, Semenova Elizaveta
Department of Experimental Physics, Faculty of Fundamental Problems of Technology, Wrocław University of Science and Technology, Wyb. Wyspiańskiego 27, 50-370, Wrocław, Poland.
DTU Electro, Department of Electrical and Photonics Engineering, Technical University of Denmark, Ørsteds Plads 343, DK-2800, Kongens Lyngby, Denmark.
Nat Commun. 2024 Apr 18;15(1):3358. doi: 10.1038/s41467-024-47551-7.
Single indistinguishable photons at telecom C-band wavelengths are essential for quantum networks and the future quantum internet. However, high-throughput technology for single-photon generation at 1550 nm remained a missing building block to overcome present limitations in quantum communication and information technologies. Here, we demonstrate the high-throughput fabrication of quantum-photonic integrated devices operating at C-band wavelengths based on epitaxial semiconductor quantum dots. Our technique enables the deterministic integration of single pre-selected quantum emitters into microcavities based on circular Bragg gratings. Respective devices feature the triggered generation of single photons with ultra-high purity and record-high photon indistinguishability. Further improvements in yield and coherence properties will pave the way for implementing single-photon non-linear devices and advanced quantum networks at telecom wavelengths.
电信C波段波长的单个不可区分光子对于量子网络和未来的量子互联网至关重要。然而，用于在1550 nm波长产生单光子的高通量技术仍然是克服当前量子通信和信息技术局限性的一个缺失环节。在此，我们展示了基于外延半导体量子点的、在C波段波长运行的量子光子集成器件的高通量制造。我们的技术能够将单个预先选定的量子发射器确定性地集成到基于圆形布拉格光栅的微腔中。相应的器件具有触发产生超高纯度单光子以及创纪录的高光子不可区分性的特性。产量和相干特性的进一步改善将为实现电信波长的单光子非线性器件和先进量子网络铺平道路。
