Phonon-assisted transitions from quantum dot excitons to cavity photons

Details Phonon-assisted transitions from quantum dot excitons to cavity photons Phonon-assisted transitions from quantum dot excitons to cavity photons

2009-10-20

arxiv.org/abs/0910.3749v1

Phys. Rev. B 80, 201311(R) (2009)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1103/PhysRevB.80.201311

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.

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