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

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 an...

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Bibliographic Details
Published in:Nature communications 2024-04, Vol.15 (1), p.3358-9, Article 3358
Main Authors: 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
Format: Article
Language:English
Subjects:
639/624/399/1017
639/624/399/1098
639/624/400/3925
639/925/927/1021
639/925/927/481
Bragg gratings
C band
Electrons
Emitters
Fabrication
Humanities and Social Sciences
Imaging techniques
Information technology
Localization
Microcavities
multidisciplinary
Photonics
Photons
Purity
Quantum dots
Science
Science (multidisciplinary)
Telecommunications
Wavelengths
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Summary: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. An efficient way of realising a large number of telecom single-photon emitters for quantum communication is still missing. Here, the authors use a wide-field imaging technique for fast localization of single InAs/InP quantum dots, which are then integrated into circular Bragg grating cavities featuring high single-photon purity and indistinguishability.
ISSN:2041-1723
2041-1723
DOI:10.1038/s41467-024-47551-7