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Tönu Pullerits. Portrait.

Tönu Pullerits

Professor

Tönu Pullerits. Portrait.

Coherent nuclear motion and exciton state dynamics in photosynthetic light-harvesting pigment proteins

Author

  • T. Pullerits
  • M. Chachisvilis
  • I. I. Fedchenia
  • M. R. Jones
  • C. N. Hunter
  • S. Larsson
  • V. Sundström

Editor

  • Pavel A. Apanasevich
  • Nikolai I. Koroteev
  • Sergei G. Kruglik
  • Victor N. Zadkov

Summary, in English

We have used approximately 40 fs pulses from a Ti:sapphire laser to investigate the ultrafast energy transfer and relaxation dynamics in the light-harvesting pigment-proteins of photosynthetic purple bacteria. Our results reveal two new features, not earlier observed in light-harvesting pigments: (1) ultrafast relaxation characterized by a time constant of approximately 20 fs, which we interpret as interexciton state relaxation; (2) coherent nuclear motions. These new results are challenging the applicability of the `standard' Forster theory to the excitation transfer in photosynthetic antennae which motivated us to examine a more detailed description of the dynamics.

Publishing year

1995

Language

English

Pages

242-252

Publication/Series

Proceedings of SPIE - The International Society for Optical Engineering

Volume

2370

Document type

Conference paper

Publisher

Society of Photo-Optical Instrumentation Engineers

Topic

  • Atom and Molecular Physics and Optics

Conference name

5th International Conference on Laser Applications in Life Sciences

Conference date

1994-06-28 - 1994-07-02

Conference place

Minsk, Belorus

Status

Published

ISBN/ISSN/Other

  • ISSN: 0277-786X
  • ISBN: 0819417157