Phonon-assisted transitions from quantum dot excitons to cavity photons

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Hohenester, Ulrich
Laucht, Arne
Kaniber, Michael
Hauke, Norman
Mohtashami, Abbas
Seliger, Marek
Finley, Jonathan J.
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Abstract
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For a single semiconductor quantum dot embedded in a microcavity, we theoretically and experimentally investigate phonon-assisted transitions between excitons and the cavity mode. Within the framework of the independent boson model we find that such transitions can be very efficient, even for relatively large exciton-cavity detunings of several millielectron volts. Furthermore, we predict a strong detuning asymmetry for the exciton lifetime that vanishes for elevated lattice temperature. Our findings are corroborated by experiment, which turns out to be in good quantitative and qualitative agreement with theory.
Keywords
Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Other Condensed Matter
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