Reducing dephasing in coupled quantum dot-cavity systems by engineering the carrier wavefunctions

Anders Nysteen, Per Kær Nielsen, Jesper Mørk

Research output: Contribution to journalConference articleResearchpeer-review

Abstract

We demonstrate theoretically how photon-assisted dephasing by the electron-phonon interaction in a coupled cavity-quantum dot system can be significantly reduced for specific QD-cavity detunings. Our starting point is a recently published theory,1 which considers longitudinal acoustic phonons, described by a non-Markovian model, interacting with a coupled quantum dot-cavity system. The reduction of phonon-induced dephasing is obtained by placing the cavity-quantum dot system inside an infinite slab, assuming spherical electronic wavefunctions. Based on our calculations, we expect this to have important implications in single-photon sources, allowing the indistinguishability of the photons to be improved.
Original languageEnglish
JournalProceedings of SPIE, the International Society for Optical Engineering
Volume8271
Pages (from-to)82710E
ISSN0277-786X
DOIs
Publication statusPublished - 2012
EventSPIE Photonics West : Quantum Dots and Nanostructures: Synthesis, Characterization, and Modeling IX - San Francisco, CA, United States
Duration: 21 Jan 201226 Jan 2012

Conference

ConferenceSPIE Photonics West : Quantum Dots and Nanostructures: Synthesis, Characterization, and Modeling IX
CountryUnited States
CitySan Francisco, CA
Period21/01/201226/01/2012

Keywords

  • Cavity QED
  • Dephasing
  • Electron-phonon interaction
  • Acoustic phonon
  • Deformation potential

Cite this

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title = "Reducing dephasing in coupled quantum dot-cavity systems by engineering the carrier wavefunctions",
abstract = "We demonstrate theoretically how photon-assisted dephasing by the electron-phonon interaction in a coupled cavity-quantum dot system can be significantly reduced for specific QD-cavity detunings. Our starting point is a recently published theory,1 which considers longitudinal acoustic phonons, described by a non-Markovian model, interacting with a coupled quantum dot-cavity system. The reduction of phonon-induced dephasing is obtained by placing the cavity-quantum dot system inside an infinite slab, assuming spherical electronic wavefunctions. Based on our calculations, we expect this to have important implications in single-photon sources, allowing the indistinguishability of the photons to be improved.",
keywords = "Cavity QED, Dephasing, Electron-phonon interaction, Acoustic phonon, Deformation potential",
author = "Anders Nysteen and Nielsen, {Per K{\ae}r} and Jesper M{\o}rk",
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Reducing dephasing in coupled quantum dot-cavity systems by engineering the carrier wavefunctions. / Nysteen, Anders; Nielsen, Per Kær; Mørk, Jesper.

In: Proceedings of SPIE, the International Society for Optical Engineering, Vol. 8271, 2012, p. 82710E.

Research output: Contribution to journalConference articleResearchpeer-review

TY - GEN

T1 - Reducing dephasing in coupled quantum dot-cavity systems by engineering the carrier wavefunctions

AU - Nysteen, Anders

AU - Nielsen, Per Kær

AU - Mørk, Jesper

PY - 2012

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N2 - We demonstrate theoretically how photon-assisted dephasing by the electron-phonon interaction in a coupled cavity-quantum dot system can be significantly reduced for specific QD-cavity detunings. Our starting point is a recently published theory,1 which considers longitudinal acoustic phonons, described by a non-Markovian model, interacting with a coupled quantum dot-cavity system. The reduction of phonon-induced dephasing is obtained by placing the cavity-quantum dot system inside an infinite slab, assuming spherical electronic wavefunctions. Based on our calculations, we expect this to have important implications in single-photon sources, allowing the indistinguishability of the photons to be improved.

AB - We demonstrate theoretically how photon-assisted dephasing by the electron-phonon interaction in a coupled cavity-quantum dot system can be significantly reduced for specific QD-cavity detunings. Our starting point is a recently published theory,1 which considers longitudinal acoustic phonons, described by a non-Markovian model, interacting with a coupled quantum dot-cavity system. The reduction of phonon-induced dephasing is obtained by placing the cavity-quantum dot system inside an infinite slab, assuming spherical electronic wavefunctions. Based on our calculations, we expect this to have important implications in single-photon sources, allowing the indistinguishability of the photons to be improved.

KW - Cavity QED

KW - Dephasing

KW - Electron-phonon interaction

KW - Acoustic phonon

KW - Deformation potential

U2 - 10.1117/12.905594

DO - 10.1117/12.905594

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JO - Proceedings of SPIE, the International Society for Optical Engineering

JF - Proceedings of SPIE, the International Society for Optical Engineering

SN - 0277-786X

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