Regensburg 2004 – scientific programme

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CPP: Chemische Physik und Polymerphysik

CPP 16: POSTER: Computational Physics, Complex Systems

CPP 16.11: Poster

Tuesday, March 9, 2004, 17:00–19:00, B

Optical absorption of dendrimers — •Christoph Supritz, Andreas Engelmann, and Peter Reineker — Department of Theoretical Physics, University of Ulm, 89069 Ulm

Dendrimers are highly branched molecules, which are expected to be useful for example as efficient artificial light harvesting systems in nano-technological applications. There exist two different classes of dendrimers: compact dendrimers in which the distance between neighbouring branching points is constant throughout the macromolecule and extended dendrimers, where this distance increases from the system periphery to the center. We investigate the linear absorption spectra of these dendrimer types using the Frenkel exciton concept. To investigate the influence of static disorder, we have chosen the localized exciton energies to be randomly distributed. In our calculations we have taken the electron-phonon interaction into account by introducing a heath bath, that interacts with the exciton in a stochastic manner.