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Coherent Nonlinear Optical Response of Single Quantum Dots Studied by Ultrafast Near-Field Spectroscopy

Title data

Guenther, Tobias ; Lienau, Christoph ; Elsaesser, Thomas ; Glanemann, Markus ; Axt, Vollrath M. ; Kuhn, Tilmann ; Eshlaghi, Soheyla ; Wieck, Andreas D.:
Coherent Nonlinear Optical Response of Single Quantum Dots Studied by Ultrafast Near-Field Spectroscopy.
In: Physical Review Letters. Vol. 89 (2002) Issue 5 . - No. 057401.
ISSN 1079-7114
DOI: https://doi.org/10.1103/PhysRevLett.89.057401

Project information

Project financing: Bundesministerium für Bildung und Forschung
Deutsche Forschungsgemeinschaft
European Union through the EFRE and SQID programs.

Abstract in another language

The nonlinear response of single GaAs quantum dots is studied in femtosecond near-field pump-probe experiments. At negative time delays, transient reflectivity spectra show pronounced oscillatory structure around the quantum dot exciton line, providing the first evidence for a perturbed free induction decay of the excitonic polarization. Phase-disturbing Coulomb interactions between the excitonic polarization and continuum excitations dominate the optical nonlinearity on ultrafast time scales. A theoretical analysis based on the semiconductor Bloch equations accounts for this behavior.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: non-linear optics; ultrafast dynamics; pump probe; quantum dots; transient reflectivity spectra; semiconductor Bloch equations; perturbed free induction decay; Ultrafast Near-Field Spectroscopy
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: 18 Oct 2017 09:20
Last Modified: 25 Oct 2017 08:12
URI: https://eref.uni-bayreuth.de/id/eprint/40079