Literatur vom gleichen Autor/der gleichen Autor*in
plus bei Google Scholar

Bibliografische Daten exportieren
 

Electron-phonon dynamics in optically excited quantum dots : Exact solution for multiple ultrashort laser pulses

Titelangaben

Vagov, Alexei ; Axt, Vollrath Martin ; Kuhn, Tilmann:
Electron-phonon dynamics in optically excited quantum dots : Exact solution for multiple ultrashort laser pulses.
In: Physical Review B. Bd. 66 (2002) Heft 16 . - 165312.
ISSN 0163-1829
DOI: https://doi.org/10.1103/PhysRevB.66.165312

Angaben zu Projekten

Projektfinanzierung: Supported by the European Commission within the Future and Emerging Technologies (FET) Project No. IST-1999-11311 (Semiconductor-based Implementation of Quantum Information Devices)

Abstract

A model of semiconductor quantum dots coupled to phonons and laser light, which is relevant in the limit of strong electronic confinement, is investigated. For an arbitrary sequence of excitations by ultrafast pulses, analytical solutions are obtained for all pertinent density-matrix elements. The results are nonperturbative with respect to the coupling to both phonons and laser light. The derivation depends neither on a particular choice of electronic wave functions nor on a particular wave-vector dependence of the phonon interaction or phonon dispersion. All components of the density matrix exhibit oscillatory dependences on the pulse areas of the exciting pulses analogously to the Rabi oscillations known from simple two-level systems. Three typical applications of the general results are worked out: (a) the influence of phonons on four-wave-mixing spectra, (b) the coherent control of electronic dot occupations in the presence of phonons, and (c) the dynamics of phonon correlations including the formation of a stable polaron spatially localized in the dot and the emission of a pulsed phonon wave packet that leaves the dot.

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Keywords: quantum dot; generating functions; non-linear optics; ultrafast dynamics; pure dephasing; phonons; analytical solutions; phonon sidebands; four-wave mixing; polaron formation; coherent control; phonon wave pakets
Institutionen der Universität: Fakultäten > Fakultät für Mathematik, Physik und Informatik > Physikalisches Institut
Fakultäten > Fakultät für Mathematik, Physik und Informatik > Physikalisches Institut > Lehrstuhl Theoretische Physik III > Lehrstuhl Theoretische Physik III - Univ.-Prof. Dr. Martin Axt
Fakultäten
Fakultäten > Fakultät für Mathematik, Physik und Informatik
Fakultäten > Fakultät für Mathematik, Physik und Informatik > Physikalisches Institut > Lehrstuhl Theoretische Physik III
Titel an der UBT entstanden: Nein
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik > 530 Physik
Eingestellt am: 18 Okt 2017 09:13
Letzte Änderung: 02 Aug 2023 12:40
URI: https://eref.uni-bayreuth.de/id/eprint/40077