Hannover 2010 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 16: Electronic Spectroscopy II
MO 16.6: Vortrag
Mittwoch, 10. März 2010, 18:00–18:15, F 102
Molecular aggregates: A non Markovian Schrödinger equation approach — Jan Roden1, Walter Strunz2, and •Alexander Eisfeld1 — 1MPI-PKS Dresden — 2TU Dresden
Since their 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 by coupling of the electronic excitation to vibrations of the constituting monomers and the surroundings [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 surroundings. The comparison with results obtained by direct diagonalization of small aggregates with a few damped vibrational modes 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] J Roden, A. Eisfeld, W. Wolff, W. Strunz, Phys. Rev. Lett. 103 (2009) 058301