Ultrafast Phenomena in II-VI Semiconductors

• Authors: H. Kalt , S. Wachter , D. Lüerssen , J. Hoffmann
• Languages of publication: EN

Abstracts

EN

We review studies on the coherent and incoherent exciton dynamics in ZnSe-based quantum wells. First, the exciton-exciton scattering parameter is determined from femtosecond four-wave mixing as a function of background exciton density generated by a prepulse. A linear increase in the excitonic homogeneous linewidth is found as a function of the background exciton density with significant different scattering parameters for the cases of interaction with coherent or incoherent excitons. Second, the thermalization dynamics of spectrally narrow hot-exciton distributions is investigated by time-resolved phonon sideband spectroscopy. Thermalization assisted by acoustic phonons occurs on a 100 ps timescale, which is in good agreement with model calculations in time dependent perturbation theory.

Keywords

EN

78.47.+p; 42.50.Md; 71.35.-y

Discipline

• 42.50.Md: Optical transient phenomena: quantum beats, photon echo, free-induction decay, dephasings and revivals, optical nutation, and self-induced transparency
• 71.35.-y: Excitons and related phenomena

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1998
• Volume: 94
• Issue: 2
• Pages: 139-146

Dates

published

1998-08

Contributors

author

H. Kalt

• Institut für Angewandte Physik, Universität Karlsruhe, 76128 Karlsruhe, Germany

author

S. Wachter

• Institut für Angewandte Physik, Universität Karlsruhe, 76128 Karlsruhe, Germany

author

D. Lüerssen

• Institut für Angewandte Physik, Universität Karlsruhe, 76128 Karlsruhe, Germany

author

J. Hoffmann

• Institut für Angewandte Physik, Universität Karlsruhe, 76128 Karlsruhe, Germany

Identifiers

DOI

10.12693/APhysPolA.94.139