Dresden 2009 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 14: POSTERS Nanoparticles
CPP 14.1: Poster
Tuesday, March 24, 2009, 14:00–16:30, P3
Energy Transfer on Molecular Aggregates — •Jan Roden1, Alexander Eisfeld1, and Walter Strunz2 — 1MPI-PKS Dresden, Finite Systems — 2TU Dresden, Theoretische Quantenoptik
Since the discovery in the 1930’s, molecular aggregates have attracted experimental and theoretical research, due to their unique linear and non-linear optical properties [1]. Furthermore they are possible candidates for artificial light harvesting units.
The properties of such molecular aggregates are strongly affected not only by static disorder, but also by internal vibrations of the constituting monomers, which couple strongly to electronic excitation [2]. To understand the optical properties and the energy transfer dynamics of molecular aggregates a theory has to properly take into account these effects.
Using a new approach based on a non Markovian Schrödinger equation [3] allows the non-perturbative treatment of internal vibrational modes of the monomers which are coupled to the surrounding. The comparison with results obtained by direct diagonalization of a model Hamiltonian containing one vibrational mode pro monomer shows good agreement. The influence of vibrations to the energy transfer is discussed.
[1] T. Kobayashi,(ed.) J-Aggregates, World Scientific, 1996
[2] A. Eisfeld, J. S. Briggs, Chem. Phys. 324, (2006) 376
[3] T. Yu, L. Diosi, N. Gisin, W. Strunz, Phys. Rev. A. 60, (1999) 91