Open AccessLow-noise quantum frequency down-conversion of indistinguishable photons
Author(s) -
Benjamin Kambs,
J. Kettler,
Matthias Bock,
Jonas Becker,
Carsten Arend,
Andreas Lenhard,
Simone Luca Portalupi,
Michael Jetter,
Peter Michler,
Christoph Becher
Publication year - 2016
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.022250
Subject(s) - photon , physics , interference (communication) , optics , spontaneous parametric down conversion , noise (video) , astronomical interferometer , visibility , wavelength , quantum information science , quantum , quantum entanglement , telecommunications , interferometry , computer science , quantum mechanics , channel (broadcasting) , artificial intelligence , image (mathematics)
We present experimental results on quantum frequency down-conversion of indistinguishable single photons emitted by an InAs/GaAs quantum dot at 904 nm to the telecom C-band at 1557 nm. Hong-Ou-Mandel (HOM) interference measurements are shown prior to and after the down-conversion step. We perform Monte-Carlo simulations of the HOM experiments taking into account the time delays of the different interferometers used and the signal-to-background ratio and further estimate the impact of spectral diffusion on the degree of indistinguishability. By that we conclude that the down-conversion step does not introduce any loss of HOM interference visibility. A noise-free conversion-process along with a high conversion-efficiency (> 30 %) emphasize that our scheme is a promising candidate for an efficient source of indistinguishable single photons at telecom wavelengths.