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Detecting strain wave propagation through quantum dots by pump-probe spectroscopy : A theoretical analysis

Title data

Huneke, Jan ; Kuhn, Tilmann ; Axt, Vollrath M.:
Detecting strain wave propagation through quantum dots by pump-probe spectroscopy : A theoretical analysis.
In: Journal of Physics: Conference Series. Vol. 210 (2010) Issue 1 . - Art.Nr. 012013, 4 S..
ISSN 1742-6596
DOI: https://doi.org/10.1088/1742-6596/210/1/012013

Project information

Project financing: Deutsche Forschungsgemeinschaft

Abstract in another language

The influence of strain waves traveling across a quantum dot structure on its optical response is studied for two different situations: First, a strain wave is created by the optical excitation of a single quantum dot near a surface which, after reflection at the surface, reenters the dot; second, a phonon wave packet is emitted by the excitation of a nearby second dot and then travels across the quantum dot. Pump-probe type excitations are simulated for quantum dots in the strong confinement limit. We show that the optical signals allow us to monitor crossing strain waves for both structures in the real-time response as well as in the corresponding pump-probe spectra. In the time-derivative of the phase of the polarization a distinct trace reflects the instantaneous shifts of the transition energy during the passage while in the spectra pronounced oscillations reveal the passage of the strain waves.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: quantum dots; strain waves; ultrafast dynamics; generating functions; analytical solutions; optical response; pump-probe
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 12:50
Last Modified: 30 Oct 2017 12:50
URI: https://eref.uni-bayreuth.de/id/eprint/40212