Polaron relaxation in self-assembled quantum dots: Breakdown of the semi-classical model

Details Polaron relaxation in self-assembled quantum dots: Breakdown of the semi-classical model Polaron relaxation in self-assembled quantum dots: Breakdown of the semi-classical model

2007-11-30

arxiv.org/abs/0711.4981v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 4 figure, accepted for publication in Phys. Rev. B (Rapid Com.)

Scientific paper

10.1103/PhysRevB.76.241304

We calculate the lifetime of conduction band excited states in self-assembled quantum dots by taking into account LO-phonon-electron interaction and various anharmonic phonon couplings. We show that polaron relaxation cannot be accurately described by a semi-classical model. The contributions of different anharmonic decay channels are shown to depend strongly on the polaron energy. We calculate the energy dependence of polaron lifetime and compare our results to available experimental measurements of polaron decay time in InAs/GaAs quantum dots.

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