Regensburg 2010 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 60: Poster II: Optical Properties, incl. Photonic Crystals and Ultrafast Phenomena

HL 60.2: Poster

Donnerstag, 25. März 2010, 18:00–20:00, Poster D1

Influence of Coulomb correlations on the quantum well intersubband absorption — •Thi Uyen-Khanh Dang, Andreas Knorr, Carsten Weber, and Marten Richter — Institut für Theoretische Physik, Technische Universität Berlin, Germany

We present a non-Markovian theory for the description of quantum well intersubband dynamics, focusing on the influence of the electron-electron interaction on the absorption properties at low temperatures. The many-body problem is treated within a density-matrix approach using the correlation expansion to obtain equations of motion for the electron density and the intersubband coherence [1]. The inclusion of the electron-electron interaction leads to a correlated electronic ground state and a self-consistently determined broadening of the intersubband absorption spectrum. The resulting influence on the absorption line shape is investigated and discussed for different quantum well widths and doping densities.

[1] I. Waldmüller et al., Phys. Rev. B 69, 20530766 (2004).