期刊
PHYSICAL REVIEW LETTERS
卷 118, 期 25, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.118.253602
关键词
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资金
- European Union's Seventh Framework Programme (FP7) [618078]
- European Research Council (ERC) [277885 QD-CQED]
- French Agence Nationale pour la Recherche (grant ANR) the French RENATECH network
- French Agence Nationale pour la Recherche (grant QDOM) the French RENATECH network
- French Agence Nationale pour la Recherche (grant SPIQE) the French RENATECH network
- French Agence Nationale pour la Recherche (grant USSEPP) the French RENATECH network
- French National Research Agency (ANR), Investissements d'Avenir program (Labex NanoSaclay) [ANR-10-LABX-0035]
- iXcore Foundation
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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