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Portrait of Tönu Pullerits; Photo: Kennet Ruona

Tönu Pullerits

Professor

Portrait of Tönu Pullerits; Photo: Kennet Ruona

Non-perturbative calculation of 2D spectra in heterogeneous systems: Exciton relaxation in the FMO complex

Author

  • Ben Brüggemann
  • Pär Kjellberg
  • Tönu Pullerits

Summary, in English

Experimental 2D frequency resolved spectra showing the relaxation of excitons in the photosynthetic antenna system FMO are reproduced by a multi-exciton density matrix approach explicitly including the external fields. The interference of the polarizations of a number of randomly placed, rotated and energetically inhomogencous complexes is used to extract the signal in the phase matching directions. It is shown that varying the laser intensity has only a minor impact, but changing the phase within the single pulses makes higher order contributions possible which lead to a fundamental change of the 2D spectra. (C) 2007 Elsevier B.V. All rights reserved.

Department/s

  • Chemical Physics

Publishing year

2007

Language

English

Pages

192-196

Publication/Series

Chemical Physics Letters

Volume

444

Issue

1-3

Document type

Journal article

Publisher

Elsevier

Topic

  • Atom and Molecular Physics and Optics

Status

Published

Research group

  • Pullerits

ISBN/ISSN/Other

  • ISSN: 0009-2614