On the Purcell effect beyond the dipole approximation

Philip Trøst Kristensen, Jakob Egeberg Mortensen, Peter Lodahl, Søren Stobbe

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

    Abstract

    We investigate spontaneous emission from excitons in quantum dots beyond the dipole approximation and show how the symmetry of the exciton wavefunction plays a crucial role. We show explicitly that for spherically symmetric excitons, the Purcell effect is independent of the exciton size and is governed by the local density of optical states at the center of the exciton only, which is identical to the result derived with the dipole approximation. This surprising result is a spontaneous emission counterpart to the shell theorem of classical mechanics and electrostatics and provides new insights to the physics of mesoscopic emitters as well as great simplifications in practical calculations.
    Original languageEnglish
    Title of host publicationAIP Conference Proceedings
    Volume1475
    PublisherAmerican Institute of Physics
    Publication date2012
    Pages68-70
    ISBN (Print)978-0-7354-1084-8
    DOIs
    Publication statusPublished - 2012
    Event5th International Workshop on Theoretical and Computational Nano-Photonics: TaCoNa-Photonics 2012 - Bad Honnef, Germany
    Duration: 24 Oct 201226 Oct 2012
    http://www.tacona-photonics.org/

    Conference

    Conference5th International Workshop on Theoretical and Computational Nano-Photonics
    Country/TerritoryGermany
    CityBad Honnef
    Period24/10/201226/10/2012
    Internet address
    SeriesA I P Conference Proceedings Series
    ISSN0094-243X

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