A bright source of telecom single photons based on quantum frequency conversion

Authors
Morrison, Christopher L.Rambach, MarkusKoong, Zhe XianGraffitti, FrancescoThorburn, FionaKar, Ajoy K.Ma, YongPark, Suk-InSong, Jin DongStoltz, Nick G.Bouwmeester, DirkFedrizzi, AlessandroGerardot, Brian D.
Issue Date
2021-04-26
Publisher
AIP Publishing
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; 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
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