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HL: Fachverband Halbleiterphysik
HL 2: Invited Talk Knorr
HL 2.1: Invited Talk
Monday, February 25, 2008, 10:15–11:00, ER 270
Theory of Ultrafast Dynamics of Electron-Phonon Interactions: Semiconductor Quantum Wells, Surfaces and Graphene — •Andreas Knorr1, Stefan Butscher1, Norbert Bücking1, Marten Richter1, Frank Milde1, Peter Kratzer2, Matthias Scheffler3, and Carsten Weber4 — 1Institut für Theoretische Physik, Technische Universität Berlin — 2Fachbereich Physik, Universität Dortmund — 3Firtz-Haber-Institut der Max-Planck-Gesellschaft, Berlin — 4Mathematical Physics, Lund University
Nanostructured semiconductors are ideal model systems to investigate the dynamics of the electron-phonon coupling in different confinement potentials.
In this talk, the simultaneous quantum dynamics of electrons and phonons is described within a Liouville space formalism for the time evolution of the statistical operator. This approach allows the self-consistent description of non-markovian dynamics and non-perturbative interaction in ultrafast electron transfer and relaxation mechanisms.
Specific systems investigated are ultrafast electron transfer between bulk and surface states at silicon surfaces, strong electron-phonon interaction for intersubband optics in nitride quantum wells and quantum cascade lasers as well as hot phonon dynamics in graphene.