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arXiv · 2304.02515

High-throughput quantum photonic devices emitting indistinguishable photons in the telecom C-band

Paweł Holewa·Daniel A. Vajner·Emilia Zięba-Ostój·Maja Wasiluk·Benedek Gaál·Aurimas Sakanas·Marek Burakowski·Paweł Mrowiński·Bartosz Krajnik·Meng Xiong·Kresten Yvind·Niels Gregersen·Anna Musiał·Alexander Huck·Tobias Heindel·Marcin Syperek·Elizaveta Semenova
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Abstract

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.

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Paweł Holewa, Daniel A. Vajner, Emilia Zięba-Ostój, Maja Wasiluk, Benedek Gaál, Aurimas Sakanas, Marek Burakowski, Paweł Mrowiński, Bartosz Krajnik, Meng Xiong, Kresten Yvind, Niels Gregersen, Anna Musiał, Alexander Huck, Tobias Heindel, Marcin Syperek, Elizaveta Semenova. 2023-04-05. High-throughput quantum photonic devices emitting indistinguishable photons in the telecom C-band. https://doi.org/10.1038/s41467-024-47551-7

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