Phonon effects on the radiative recombination of excitons in double quantum dots

Details Phonon effects on the radiative recombination of excitons in double quantum dots Phonon effects on the radiative recombination of excitons in double quantum dots

2011-05-27

arxiv.org/abs/1105.5597v1

Phys. Rev. B 84, 195315 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

10 pages, 7 figures

Scientific paper

10.1103/PhysRevB.84.195315

We study theoretically the radiative recombination of excitons in double quantum dots in the presence of carrier-phonon coupling. We show that the phonon-induced pure dephasing effects and transitions between the exciton states strongly modify the spontaneous emission process and make it sensitive to temperature, which may lead to non-monotonic temperature dependence of the time-resolved luminescence. We show also that under specific resonance conditions the biexcitonic interband polarization can be coherently transferred to the excitonic one, leading to an extended life time of the total coherent polarization, which is reflected in the nonlinear optical spectrum of the system. We study the stability of this effect against phonon-induced decoherence.

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