Ultrafast depopulation of a quantum dot by LA-phonon-assisted stimulated emission

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

Research output: Contribution to journalArticlepeer-review

81 Downloads (Pure)


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
Issue number16
Publication statusPublished - 18 Apr 2016

Cite this