Dresden 2009 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 9: Poster 1

HL 9.51: Poster

Montag, 23. März 2009, 14:30–17:00, P2

Simulation of wavepropagation in nanocrystalline powders — •Daniel Schneider, Johannes Fallert, Janos Sartor, Roman J. B. Dietz, Viktor Zalamai, Claus Klingshirn, and Heinz Kalt — Institut für Angewandte Physik, Universität Karlsruhe (TH), Germany

In strongly scattering and optically amplifying materials, random lasing can be observed at sufficient high excitation powers. Apart from pure signal amplification in such a laser spectrally sharp and spatially localized modes can be observed due to backscattering and interference. In this contribution we show simulations of the localized random lasing modes which are based on a finite difference time domain method. This way the propagation of electromagnetic waves in randomly aligned nano particles can be calculated. The simulation parameters are fitted to actual experiments on ZnO nanoparticles in order to compare the results of the simulations with experimental data.