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Phonon-Induced Rabi-Frequency Renormalization of Optically Driven Single InGaAs/GaAs Quantum Dots

Ramsay, AJ; Godden, TM; Boyle, SJ; Gauger, EM; Nazir, A; Lovett, BW; Fox, AM; (2010) Phonon-Induced Rabi-Frequency Renormalization of Optically Driven Single InGaAs/GaAs Quantum Dots. PHYS REV LETT , 105 (17) , Article 177402. 10.1103/PhysRevLett.105.177402. Green open access

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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 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.

Type: Article
Title: Phonon-Induced Rabi-Frequency Renormalization of Optically Driven Single InGaAs/GaAs Quantum Dots
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.105.177402
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.105.177402
Language: English
Additional information: © 2010 The American Physical Society
Keywords: DYNAMICS, SYSTEM
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: https://discovery.ucl.ac.uk/id/eprint/80970
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