Damping of Exciton Rabi Rotations by Acoustic Phonons in Optically Excited InGaAs/GaAs Quantum Dots
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We report experimental evidence identifying acoustic phonons as the principal source of the excitation-induced-dephasing (EID) responsible for the intensity damping of quantum dot excitonic Rabi rotations. The rate of EID is extracted from temperature dependent Rabi rotation measurements of the ground-state excitonic transition, and is found to be in close quantitative agreement with an acoustic-phonon model.
Ramsay , A J , Gopal , A , Gauger , E M , Nazir , A , Lovett , B W , Fox , A M & Skolnick , M S 2010 , ' Damping of Exciton Rabi Rotations by Acoustic Phonons in Optically Excited InGaAs/GaAs Quantum Dots ' Physical Review Letters , vol 104 , no. 1 , 017402 . DOI: 10.1103/PhysRevLett.104.017402
Physical Review Letters
© 2010. The American Physical Society.
The authors thank the EPSRC (UK) EP/G001642, the QIPIRC UK, and the UK-India Education Research Initiative/ Department of Science and Technology (India) for financial support. A. N. is supported by the EPSRC, and BWL by the Royal Society.
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