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

doi:10.1103/PhysRevLett.105.177402

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

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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.

Original language	English
Article number	177402
Number of pages	4
Journal	Physical Review Letters
Volume	105
Issue number	17
DOIs	https://doi.org/10.1103/PhysRevLett.105.177402
Publication status	Published - 20 Oct 2010

Keywords

Dynamics
System

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10.1103/PhysRevLett.105.177402

ramsay2010physrevlett177402
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title = "Phonon-Induced Rabi-Frequency Renormalization of Optically Driven Single InGaAs/GaAs Quantum Dots",

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.",

keywords = "Dynamics, System",

author = "Ramsay, {A. J.} and Godden, {T. M.} and Boyle, {S. J.} and Gauger, {E. M.} and A. Nazir and Lovett, {Brendon William} and Fox, {A. M.} and Skolnick, {M. S.}",

note = "The authors thank the EPSRC (U.K.) EP/G001642, and the QIPIRC U.K. for financial support. A. N. is supported by the EPSRC and B.W. L. by the Royal Society.",

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doi = "10.1103/PhysRevLett.105.177402",

language = "English",

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T1 - Phonon-Induced Rabi-Frequency Renormalization of Optically Driven Single InGaAs/GaAs Quantum Dots

AU - Ramsay, A. J.

AU - Godden, T. M.

AU - Boyle, S. J.

AU - Gauger, E. M.

AU - Nazir, A.

AU - Lovett, Brendon William

AU - Fox, A. M.

AU - Skolnick, M. S.

N1 - The authors thank the EPSRC (U.K.) EP/G001642, and the QIPIRC U.K. for financial support. A. N. is supported by the EPSRC and B.W. L. by the Royal Society.

PY - 2010/10/20

Y1 - 2010/10/20

N2 - 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.

AB - 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.

KW - Dynamics

KW - System

UR - http://prl.aps.org/abstract/PRL/v105/i17/e177402

U2 - 10.1103/PhysRevLett.105.177402

DO - 10.1103/PhysRevLett.105.177402

M3 - Article

SN - 0031-9007

VL - 105

JO - Physical Review Letters

JF - Physical Review Letters

IS - 17

M1 - 177402

ER -

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

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