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Coherent control of phonon quantum beats

Titelangaben

Axt, Vollrath Martin ; Herbst, M. ; Kuhn, Tilmann:
Coherent control of phonon quantum beats.
In: Superlattices and Microstructures. Bd. 26 (1999) Heft 2 . - S. 117-128.
ISSN 0749-6036
DOI: https://doi.org/10.1006/spmi.1999.0765

Angaben zu Projekten

Projektfinanzierung: Deutsche Forschungsgemeinschaft
European Union network Ultrafast Quantum Optoelectronics and HLRZ Jülich

Abstract

Abstract The coherent control of excitons coupled to longitudinal optical phonons is analyzed in the quantum kinetic regime. Different models allowing for different levels of sophistication in the theoretical treatment are compared. Within a simple two-level model of the exciton system analytical results relevant for short-time excitation in the low-density regime are derived, which are nonperturbative with respect to the exciton–phonon interaction. For pulses of finite duration and high intensity, numerical calculations are presented realizing a nonperturbative treatment with respect to both the exciton–phonon as well as the exciton–photon coupling. It is shown that for two-level systems, the use of high intensity pulses opens new possible control scenarios that combine the effects of phase control with Rabi oscillations. These findings are compared with quantum kinetic calculations for a two-band semiconductor model. Here we present results for one, two and three dimensions. Within this model, the coupling to the continuum of states above the band edge provides a dephasing mechanism missing in few-level models. It is shown that also the dephasing properties can be coherently controlled. Furthermore, it is demonstrated that the strength and controllability of phonon beats characteristically depend on the dimension of the system.

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Keywords: Coherent control; Phonon quantum beats; phonons; Control of dephasing; Semiconductors; ultrafast dynamics; generating functions
Institutionen der Universität: Fakultäten > Fakultät für Mathematik, Physik und Informatik > Physikalisches Institut
Fakultäten > Fakultät für Mathematik, Physik und Informatik > Physikalisches Institut > Lehrstuhl Theoretische Physik III > Lehrstuhl Theoretische Physik III - Univ.-Prof. Dr. Martin Axt
Fakultäten
Fakultäten > Fakultät für Mathematik, Physik und Informatik
Fakultäten > Fakultät für Mathematik, Physik und Informatik > Physikalisches Institut > Lehrstuhl Theoretische Physik III
Titel an der UBT entstanden: Nein
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik > 530 Physik
Eingestellt am: 17 Okt 2017 10:46
Letzte Änderung: 08 Mär 2022 08:21
URI: https://eref.uni-bayreuth.de/id/eprint/40039