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- Title
High-throughput quantum photonic devices emitting indistinguishable photons in the telecom C-band.
- 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
- 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. 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.
- Subjects
SINGLE photon generation; TELECOMMUNICATION; QUANTUM communication; BRAGG gratings; PHOTONS; SEMICONDUCTOR quantum dots; PHOTONIC crystals
- Publication
Nature Communications, 2024, Vol 15, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-024-47551-7