title: Occurrence of intersubband polaronic repellons in a two-dimensional electron gas.
abstract: Counteracting electron-phonon and electron-electron interaction in the optical absorption spectra of a quantum well intersubband system can have a significant impact on the line shape and line width of optical transitions at low temperatures. In particular, polaronic repellons can be formed due to an attractive intersubband polaron-polaron interaction. At low temperatures and for properly chosen densities; this effect can lead to a line broadening of the intersubband transition, even in a weak coupling regime.
authors.affiliation: Institute for Theoretical Physics, Nonlinear Optics and Quantum Electronics, Technical University Berlin, PN 7-1 Hardenbergstrasse 36, 10623 Berlin, Germany. butscher@itp.physik.tu-berlin.de
authors.forename: Stefan
authors.initials: S
authors.lastname: Butscher
authors.forename: Andreas
authors.initials: A
authors.lastname: Knorr