Triggered telecom C-band single-photon source with high brightness, high
indistinguishability and sub-GHz spectral linewidth
- URL: http://arxiv.org/abs/2310.20647v1
- Date: Tue, 31 Oct 2023 17:18:30 GMT
- Title: Triggered telecom C-band single-photon source with high brightness, high
indistinguishability and sub-GHz spectral linewidth
- Authors: Raphael Joos, Stephanie Bauer, Christian Rupp, Sascha Kolatschek,
Wolfgang Fischer, Cornelius Nawrath, Ponraj Vijayan, Robert Sittig, Michael
Jetter, Simone L. Portalupi, Peter Michler
- Abstract summary: Long-range, terrestrial quantum networks will require high brightness single-photon sources.
Many applications demand triggered operation with high indistinguishability and narrow spectral linewidth.
We present a coherently (incoherently) optically-pumped narrow-band (0.8 GHz) triggered single-photon source in the telecom C-band.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Long-range, terrestrial quantum networks will require high brightness
single-photon sources emitting in the telecom C-band for maximum transmission
rate. Many applications additionally demand triggered operation with high
indistinguishability and narrow spectral linewidth. This would enable the
efficient implementation of photonic gate operations and photon storage in
quantum memories, as for instance required for a quantum repeater. Especially,
semiconductor quantum dots (QDs) have shown these properties in the
near-infrared regime. However, the simultaneous demonstration of all these
properties in the telecom C-band has been elusive. Here, we present a
coherently (incoherently) optically-pumped narrow-band (0.8 GHz) triggered
single-photon source in the telecom C-band. The source shows simultaneously
high single-photon purity with $g^{(2)}(0) = 0.026$ ($g^{(2)}(0) = 0.014$),
high two-photon interference visibility of 0.508 (0.664) and high
application-ready rates of 0.75 MHz (1.45 MHz) of polarized photons. The source
is based on a QD coupled to a circular Bragg grating cavity combined with
spectral filtering. Coherent (incoherent) operation is performed via the novel
SUPER scheme (phonon-assisted excitation).
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