Titlebar

Export bibliographic data
Literature by the same author
plus on the publication server
plus at Google Scholar

 

Energy transport and coherence properties of acoustic phonons generated by optical excitation of a quantum dot

Title data

Wigger, Daniel ; Lüker, Sebastian ; Reiter, Doris ; Axt, Vollrath M. ; Machnikowski, Paweł ; Kuhn, Tilmann:
Energy transport and coherence properties of acoustic phonons generated by optical excitation of a quantum dot.
In: Journal of Physics: Condensed Matter. Vol. 26 (2014) Issue 35 . - Art.Nr. 355802 , 14 S..
ISSN 1361-648X
DOI: https://doi.org/10.1088/0953-8984/26/35/355802

Project information

Project financing: Deutsche Forschungsgemeinschaft

Abstract in another language

The energy transport of acoustic phonons generated by the optical excitation of a quantum dot as well as the coherence properties of these phonons are studied theoretically both for the case of a pulsed excitation and for a continuous wave (CW) excitation switched on instantaneously. For a pulsed excitation, depending on pulse area and pulse duration, a finite number of phonon wave packets is emitted, while for the case of a CW excitation a sequence of wave packets with decreasing amplitude is generated after the excitation has been switched on. We show that the energy flow associated with the generated phonons is partly related to coherent phonon oscillations and partly to incoherent phonon emission. The efficiency of the energy transfer to the phonons and the details of the energy flow depend strongly and in a non-monotonic way on the Rabi frequency exhibiting a resonance behavior. However, in the case of CW excitation it turns out that the total energy transferred to the phonons is directly linked in a monotonic way to the Rabi frequency.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: phonon wave packets; phonon dynamics; coherent phonons; incoherent phonons; energy transport; ultrafast dynamics; electron-phonon interaction; quantum dot
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: 03 Nov 2017 07:51
Last Modified: 03 Nov 2017 07:51
URI: https://eref.uni-bayreuth.de/id/eprint/40260