Proposed Quenching of Phonon-Induced Processes in Photoexcited Quantum Dots due to Electron-Hole Asymmetries

Anders Nysteen, Per Kær Nielsen, Jesper Mørk

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Differences in the confinement of electrons and holes in quantum dots are shown to profoundly impact the magnitude of scattering with acoustic phonons. Using an extensive model that includes the non-Markovian nature of the phonon reservoir, we show how the effect may be addressed by photoluminescence excitation spectroscopy of a single quantum dot. We also investigate the implications for cavity QED, i.e., a coupled quantum dot-cavity system, and demonstrate that the phonon scattering may be strongly quenched. The quenching is explained by a balancing between the deformation potential interaction strengths and the carrier confinement and depends on the quantum dot shape. Numerical examples suggest a route towards engineering the phonon scattering.
Original languageEnglish
Article number087401
JournalPhysical Review Letters
Volume110
Issue number8
Number of pages5
ISSN0031-9007
DOIs
Publication statusPublished - 2013

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