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Coherent nonlinear optical response of excitons and biexcitons in quantum dots coupled to phonons

Title data

Krügel, A. ; Axt, Vollrath M. ; Kuhn, Tilmann ; Vagov, Alexei ; Peeters, F. M.:
Coherent nonlinear optical response of excitons and biexcitons in quantum dots coupled to phonons.
In: Physica Status Solidi B. Vol. 243 (2006) Issue 10 . - pp. 2241-2246.
ISSN 1521-3951
DOI: https://doi.org/10.1002/pssb.200668034

Project information

Project financing: Deutsche Forschungsgemeinschaft
The Flemish Science Foundation (FWO-Vl), the ESF network: Arrays of Quantum Dots and Josephson Junctions, and the EU-Network of Excellence: SANDiE

Abstract in another language

Four wave mixing signals from single dots and dot ensembles involving excitonic and biexcitonic transitions are discussed. The results have been obtained analytically from a four level dot model coupled to longitudinal acoustic phonons. Time integrated four wave mixing amplitudes for quantum dot ensembles exhibit polarization dependent quantum beats that have already been found in experimental data. In four wave mixing signals of single quantum dots we find that the ground state to exciton transition has two contributions. One is identical to the known solution of the two level quantum dot model and leads to symmetric spectra for longer delay times, while the other comprises phase information from the biexciton and results in asymmetric spectra.

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; four-wave mixing; polaron formation; Non-perturbative solution; decoherence; biexcitons; excitons; non-Markovian dynamics
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: 24 Oct 2017 08:44
Last Modified: 24 Oct 2017 08:44
URI: https://eref.uni-bayreuth.de/id/eprint/40136