Ultrafast depopulation of a quantum dot by LA-phonon-assisted stimulated emission. / Liu, F.; Martins, L. M P; Brash, A. J.; Barth, A. M.; Quilter, J. H.; Axt, V. M.; Skolnick, M. S.; Fox, A. M.

In: Physical Review B, Vol. 93, No. 16, 161407(R) , 18.04.2016, p. 1-5.

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  • F. Liu
  • L. M P Martins
  • A. J. Brash
  • A. M. Barth
  • J. H. Quilter
  • V. M. Axt
  • M. S. Skolnick
  • A. M. Fox

Abstract

We demonstrate ultrafast incoherent depopulation of a quantum dot from above to below the transparency point using LA-phonon-assisted emission stimulated by a redshifted laser pulse. The QD is turned from a weakly vibronic system into a strongly vibronic one by laser driving which enables the phonon-assisted relaxation between the excitonic components of two dressed states. The depopulation is achieved within a laser pulse-width-limited time of 20 ps and exhibits a broad tuning range of a few meV. Our experimental results are well reproduced by path-integral calculations.
Original languageEnglish
Article number161407(R)
Pages (from-to)1-5
Number of pages5
JournalPhysical Review B
Volume93
Issue number16
DOIs
Publication statusPublished - 18 Apr 2016
This open access research output is licenced under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License.

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