Berlin 2008 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 31: Poster II
HL 31.40: Poster
Dienstag, 26. Februar 2008, 16:30–19:00, Poster D
Optical Bloch equations for coupled nanosystems: linear spectra, saturation dynamics and pump-test spectra — •Marten Richter1, Thomas Renger2, and Andreas Knorr1 — 1Institut für Theoretische Physik, AG Nichtlineare Optik und Quantenelektronik, Technische Universität Berlin, Germany — 2Institut für Chemie und Biochemie, Freie Universität Berlin, Germany
Bloch equations for optical and electronic processes in Coulomb-coupled nanostructures (like pigments in pigment protein complexes or semiconductor quantum dots) are presented. The theory includes Förster coupling induced excitation transfer between the nanostructures, electron-vibrational coupling between the nanosystems and their environment as well as the interaction with arbitrary strong external optical fields. The theory is based on many particle Liouville and correlation expansion techniques. In the case of photosynthetic antenna complexes the parameters of the theory are derived from crystal structure data. As a typical example, a comparison of simulated data and experimental results for the intensity dependent fluorescence yield of the light harvesting complex of photosystem II is discussed.