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Generation of coherent LO phonons in optically driven biased quantum wells

Title data

Papenkort, Thomas ; Kuhn, Tilmann ; Axt, Vollrath M.:
Generation of coherent LO phonons in optically driven biased quantum wells.
In: Physica Status Solidi C. Vol. 8 (2011) Issue 4 . - pp. 1121-1124.
ISSN 1610-1642
DOI: https://doi.org/10.1002/pssc.201000823

Project information

Project financing: Deutsche Forschungsgemeinschaft

Abstract in another language

We present a theoretical analysis and numerical simulations of the resonant generation of coherent LO phonons in an electrically biased quantum well. The system is driven by a laser pulse short enough to simultaneously excite two transitions, which leads to a quantum beat that can resonantly create coherent phonons. The generation of incoherent phonons is also calculated on a quantum kinetic level and found to be dominant in terms of the energy transferred to the lattice.The simulations successfully reproduce the main features found in recent experiments Mizoguchi et al., Appl. Phys. Lett. 94, 171105 (2009). Depending on the excitation conditions different generation mechanisms can be discerned. We discuss their characteristics and their relative efficiency in the special case of the quantum well model under consideration.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: intersubband relaxation; coherent phonons; LO phonons; quantum wells; quantum kinetics; ultrafast dynamics; phonon generation
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 13:29
Last Modified: 30 Oct 2017 13:29
URI: https://eref.uni-bayreuth.de/id/eprint/40222