Temperature-Dependent Mollow Triplet Spectra from a Single Quantum Dot: Rabi Frequency Renormalization and Sideband Linewidth Insensitivity

Yu-Jia Wei, Yu He, Yu-Ming He, Chao-Yang Lu, Jian-Wei Pan, Christian Schneider, Martin Kamp, Sven Höfling, Dara McCutcheon

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Abstract

We investigate temperature-dependent resonance fluorescence spectra obtained from a single self- assembled quantum dot. A decrease of the Mollow triplet sideband splitting is observed with increasing temperature, an effect we attribute to a phonon-induced renormalization of the driven dot Rabi frequency. We also present first evidence for a nonperturbative regime of phonon coupling, in which the expected linear increase in sideband linewidth as a function of temperature is canceled by the corresponding reduction in Rabi frequency. These results indicate that dephasing in semiconductor quantum dots may be less sensitive to changes in temperature than expected from a standard weak-coupling analysis of phonon effects
Original languageEnglish
Article number097401-1
JournalPhysical Review Letters
Volume113
Number of pages5
ISSN0031-9007
DOIs
Publication statusPublished - 2014

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