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

Title data

Liu, Feng ; Martins, L. M. P. ; Brash, A. J. ; Barth, Andreas M. ; Quilter, John H. ; Axt, Vollrath Martin ; Skolnick, M. S. ; Fox, A. M.:
Ultrafast depopulation of a quantum dot by LA-phonon-assisted stimulated emission.
In: Physical Review B. Vol. 93 (2016) Issue 16 . - Art.Nr. 161407(R), 5 S..
ISSN 0163-1829
DOI: https://doi.org/10.1103/PhysRevB.93.161407

Project information

Project financing: Deutsche Forschungsgemeinschaft
Supported by the EPSRC (UK) programme Grant No. EP/J007544/1

Abstract in another language

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.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: quantum dot; path-integrals; nonlinear optics; ultrafast dynamics; pure dephasing; phonons; decoherence; exciton depopulation; non-Markovian dynamics; memory effects; phonon-induced memory; multi-phonon processes; phonon-assisted off-resonant control; numerically complete real-time path integrals; quantum dissipative dynamics; exciton control; Spectroscopy; semiconductors; Ultrafast processes in condensed matter; including semiconductors
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Theoretical Physics III > Chair Theoretical Physics III - Univ.-Prof. Dr. Martin Axt
Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Theoretical Physics III
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 03 Nov 2017 11:16
Last Modified: 29 Oct 2019 07:30
URI: https://eref.uni-bayreuth.de/id/eprint/40289