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arXiv · 1005.1580

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

A. J. Ramsay·T. M. Godden·S. J. Boyle·E. M. Gauger·A. Nazir·B. W. Lovett·A. M. Fox·M. S. Skolnick
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Abstract

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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A. J. Ramsay, T. M. Godden, S. J. Boyle, E. M. Gauger, A. Nazir, B. W. Lovett, A. M. Fox, M. S. Skolnick. 2010-10-21. Phonon induced Rabi frequency renormalization of optically driven single InGaAs/GaAs quantum dots. https://doi.org/10.1103/physrevlett.105.177402

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