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Tönu Pullerits. Portrait.

Tönu Pullerits

Professor

Tönu Pullerits. Portrait.

Exciton dynamics in the light-harvesting complexes of Rhodobacter sphaeroides

Author

  • T. Pullerits
  • M. Chachisvilis
  • M. R. Jones
  • C. N. Hunter
  • V. Sundström

Summary, in English

We have used ≈ 40 fs pulses from a Ti:Sa laser to investigate the ultrafast energy transfer and relaxation dynamics in the LH1 and LH2 light-harvesting pigment-proteins of photosynthetic purple bacteria. Our results reveal a new feature, not earlier observed in light-harvesting pigments, ultrafast relaxation characterized by a time constant of approximately 20 fs, which we interpret as interexciton state relaxation. The experimental results are compared with computer simulations of transient excited state absorption from the excited states of an excitonic aggregate.

Publishing year

1994-07-15

Language

English

Pages

355-365

Publication/Series

Chemical Physics Letters

Volume

224

Issue

3-4

Document type

Journal article

Publisher

Elsevier

Status

Published

ISBN/ISSN/Other

  • ISSN: 0009-2614