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Coupled polarization and acoustic-phonon dynamics after optical excitation of quantum dots near surfaces

Title data

Krummheuer, B. ; Axt, Vollrath M. ; Kuhn, Tilmann:
Coupled polarization and acoustic-phonon dynamics after optical excitation of quantum dots near surfaces.
In: Physical Review B. Vol. 72 (2005) Issue 24 . - p. 245336. - No. 245336, 11 Seiten.
ISSN 0163-1829
DOI: https://doi.org/10.1103/PhysRevB.72.245336

Project information

Project financing: Deutsche Forschungsgemeinschaft

Abstract in another language

An analysis of the pure dephasing of a single quantum dot embedded in a half-space or a free-standing slab due to the interaction of the carriers with confined acoustic phonons is presented. We discuss the time dependence of the polarization and the relative volume change based on exact expressions which hold for ultrafast excitation. We find that the proximity of the quantum dot to a surface leaves distinct traces in the polarization and in the case of the half-space leads to an additional decay. In the case of the slab the polarization shows a pronounced periodic structure depending on the width of the slab.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: quantum dot; generating functions; non-linear optics; ultrafast dynamics; pure dephasing; phonons; analytical solutions; phonon sidebands; excitons; Non-perturbative solution; phonons in confined systems; surface phonons
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: No
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 23 Oct 2017 10:55
Last Modified: 23 Oct 2017 10:55
URI: https://eref.uni-bayreuth.de/id/eprint/40120