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.

We study optically driven Rabi rotations of a quantum dot exciton transition between 5 and 50 K, and for pulse areas of up to 14π. 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 th...

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Bibliographic Details
Main Authors: Ramsay, A, Godden, T, Boyle, S, Gauger, E, Nazir, A, Lovett, B, Fox, A, Skolnick, MS
Format: Journal article
Language:English
Published: 2010
Description
Summary:We study optically driven Rabi rotations of a quantum dot exciton transition between 5 and 50 K, and for pulse areas of up to 14π. 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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