Phonon induced Rabi frequency renormalization of optically driven single InGaAs/GaAs quantum dots

Details Phonon induced Rabi frequency renormalization of optically driven single InGaAs/GaAs quantum dots Phonon induced Rabi frequency renormalization of optically driven single InGaAs/GaAs quantum dots

2010-05-10

arxiv.org/abs/1005.1580v2

Physical Review Letters 105 177402 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4-pages, 2 figs, final version published in PRL

Scientific paper

10.1103/PhysRevLett.105.177402

We study optically driven Rabi rotations of a quantum dot exciton transition between 5 and 50 K, and for pulse-areas of up to $14\pi$. In a high driving field regime, the decay of the Rabi rotations is nonmonotonic, and the period decreases with pulse-area and increases with temperature. By comparing the experiments to a weak-coupling model of the exciton-phonon interaction, we demonstrate that the observed renormalization of the Rabi frequency is induced by fluctuations in the bath of longitudinal acoustic phonons, an effect that is a phonon analogy of the Lamb-shift.

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