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Influence of the pulse shape and the dot size on the decay and reappearance of Rabi rotations in laser driven quantum dots

Title data

Glässl, Martin ; Croitoru, Mikhail D. ; Vagov, Alexei ; Axt, Vollrath M. ; Kuhn, Tilmann:
Influence of the pulse shape and the dot size on the decay and reappearance of Rabi rotations in laser driven quantum dots.
In: Physical Review B. Vol. 84 (2011) Issue 12 . - Art.Nr. 125304, 7 S..
ISSN 0163-1829
DOI: https://doi.org/10.1103/PhysRevB.84.125304

Project information

Project financing: Alexander von Humboldt-Stiftung
Studienstiftung des Deutschen Volkes

Abstract in another language

We study the dynamics of strongly confined semiconductor quantum dots coupled to acoustic phonons and driven by external laser pulses by a numerical path integral method. The field-dependent damping, caused by the non-Markovian processes of pure dephasing and manifesting itself in the peculiar decay and reappearance phenomenon of Rabi rotations is found to depend notably on the dot size and the shape of the applied laser pulses. In the limit of strong fields rectangular pulses yield a significant weaker damping than Gaussian or other bell-shaped profiles. As a consequence, the undamping of Rabi rotations at high pulse areas is most clearly visible for rectangular pulses.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: quantum dot; path-integrals; non-linear optics; ultrafast dynamics; pure dephasing; phonons; decoherence; excitons; non-Markovian dynamics; memory effects; phonon-induced memory; multi-phonon processes; damping of Rabi oscillations; reappearance of Rabi rotations
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: 30 Oct 2017 14:18
Last Modified: 30 Oct 2017 14:18
URI: https://eref.uni-bayreuth.de/id/eprint/40228