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, Brendon William Lovett, A. M. Fox, M. S. Skolnick

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

154 Citations (Scopus)

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 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.

Original languageEnglish
Article number177402
Number of pages4
JournalPhysical Review Letters
Volume105
Issue number17
DOIs
Publication statusPublished - 20 Oct 2010

Keywords

  • Dynamics
  • System

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