Reducing Phonon-Induced Decoherence in Solid-State Single-Photon Sources with Cavity Quantum Electrodynamics

T. Grange, N. Somaschi, C. Antón, L. De Santis, G. Coppola, V. Giesz, A. Lemaître, I. Sagnes, A. Auffèves, and P. Senellart
Phys. Rev. Lett. 118, 253602 – Published 23 June 2017
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Abstract

Solid-state emitters are excellent candidates for developing integrated sources of single photons. Yet, phonons degrade the photon indistinguishability both through pure dephasing of the zero-phonon line and through phonon-assisted emission. Here, we study theoretically and experimentally the indistinguishability of photons emitted by a semiconductor quantum dot in a microcavity as a function of temperature. We show that a large coupling to a high quality factor cavity can simultaneously reduce the effect of both phonon-induced sources of decoherence. It first limits the effect of pure dephasing on the zero-phonon line with indistinguishabilities above 97% up to 18 K. Moreover, it efficiently redirects the phonon sidebands into the zero-phonon line and brings the indistinguishability of the full emission spectrum from 87% (24%) without cavity effect to more than 99% (76%) at 0K (20K). We provide guidelines for optimal cavity designs that further minimize the phonon-induced decoherence.

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  • Received 9 December 2016

DOI:https://doi.org/10.1103/PhysRevLett.118.253602

© 2017 American Physical Society

Physics Subject Headings (PhySH)

Quantum Information, Science & TechnologyCondensed Matter, Materials & Applied PhysicsAtomic, Molecular & Optical

Authors & Affiliations

T. Grange1,2,*, N. Somaschi3,†, C. Antón3, L. De Santis3,4, G. Coppola3, V. Giesz3, A. Lemaître3, I. Sagnes3, A. Auffèves1,2,‡, and P. Senellart3,§

  • 1Université Grenoble Alpes, F-38000 Grenoble, France
  • 2Centre National de la Recherche Scientifique, Institut Néel, Nanophysique et Semiconducteurs Group, F-38000 Grenoble, France
  • 3Centre de Nanosciences et de Nanotechnologies, CNRS, Université Paris–Sud, UMR 9001, Université Paris–Saclay, C2N—Marcoussis, 91460 Marcoussis, France
  • 4Université Paris–Sud, Université Paris–Saclay, F-91405 Orsay, France

  • *thomas.grange@neel.cnrs.fr
  • niccolo.somaschi@c2n.upsaclay.fr
  • alexia.auffeves@neel.cnrs.fr
  • §pascale.senellart-mardon@c2n.upsaclay.fr

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Issue

Vol. 118, Iss. 25 — 23 June 2017

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