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

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