A bright source of telecom single photons based on quantum frequency conversion
- Authors
- Morrison, Christopher L.; Rambach, Markus; Koong, Zhe Xian; Graffitti, Francesco; Thorburn, Fiona; Kar, Ajoy K.; Ma, Yong; Park, Suk-In; Song, Jin Dong; Stoltz, Nick G.; Bouwmeester, Dirk; Fedrizzi, Alessandro; Gerardot, Brian D.
- Issue Date
- 2021-04
- Publisher
- American Institute of Physics
- Citation
- Applied Physics Letters, v.118, no.17
- Abstract
- On-demand indistinguishable single-photon sources are essential for quantum networking and communication. Semiconductor quantum dots are among the most promising candidates, but their typical emission wavelength renders them unsuitable for use in fiber networks. Here, we present quantum frequency conversion of near-infrared photons from a bright quantum dot to the telecommunication C-band, allowing integration with existing fiber architectures. We use a custom-built, tunable 2400nm seed laser to convert single photons from 942nm to 1550nm in a difference-frequency generation process. We achieve an end-to-end conversion efficiency of similar or equal to 35%, demonstrate count rates approaching 1MHz at 1550nm with g(2)(0) = 0.043(1), and achieve Hong-Ou-Mandel (HOM) visibilities of 60%. We expect this scheme to be preferable to quantum dot sources directly emitting at telecom wavelengths for fiber-based quantum networking. (C) 2021 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
- Keywords
- DOT SPIN; DOWNCONVERSION; telecom single photons; quantum frequency conversion; InAs; quantum dots
- ISSN
- 0003-6951
- URI
- https://pubs.kist.re.kr/handle/201004/117115
- DOI
- 10.1063/5.0045413
- Appears in Collections:
- KIST Article > 2021
- Files in This Item:
There are no files associated with this item.
- Export
- RIS (EndNote)
- XLS (Excel)
- XML
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.