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

Pullerits, T. LU ; Chachisvilis, M. LU ; Fedchenia, I. I. ; Jones, M. R. ; Hunter, C. N. ; Larsson, S. and Sundström, V. LU (1995) 5th International Conference on Laser Applications in Life Sciences In Proceedings of SPIE - The International Society for Optical Engineering 2370. p.242-252
Abstract

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.

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author
; ; ; ; ; and
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
host publication
5th International Conference on Laser Applications in Life Sciences : 28 June-2 July 1994, Minsk, Belarus
series title
Proceedings of SPIE - The International Society for Optical Engineering
editor
Apanasevich, Pavel A. ; Koroteev, Nikolai I. ; Kruglik, Sergei G. and Zadkov, Victor N.
volume
2370
pages
11 pages
publisher
Society of Photo-Optical Instrumentation Engineers
conference name
5th International Conference on Laser Applications in Life Sciences
conference location
Minsk, Belorus
conference dates
1994-06-28 - 1994-07-02
external identifiers
  • scopus:0029226571
ISSN
0277-786X
ISBN
0819417157
DOI
10.1117/12.197447
language
English
LU publication?
no
id
2b2e6f8d-90d2-4f20-8164-e263c6b81d98
date added to LUP
2025-10-21 14:40:03
date last changed
2025-10-30 15:37:07
@inproceedings{2b2e6f8d-90d2-4f20-8164-e263c6b81d98,
  abstract     = {{<p>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.</p>}},
  author       = {{Pullerits, T. and Chachisvilis, M. and Fedchenia, I. I. and Jones, M. R. and Hunter, C. N. and Larsson, S. and Sundström, V.}},
  booktitle    = {{5th International Conference on Laser Applications in Life Sciences : 28 June-2 July 1994, Minsk, Belarus}},
  editor       = {{Apanasevich, Pavel A. and Koroteev, Nikolai I. and Kruglik, Sergei G. and Zadkov, Victor N.}},
  isbn         = {{0819417157}},
  issn         = {{0277-786X}},
  language     = {{eng}},
  pages        = {{242--252}},
  publisher    = {{Society of Photo-Optical Instrumentation Engineers}},
  series       = {{Proceedings of SPIE - The International Society for Optical Engineering}},
  title        = {{Coherent nuclear motion and exciton state dynamics in photosynthetic light-harvesting pigment proteins}},
  url          = {{http://dx.doi.org/10.1117/12.197447}},
  doi          = {{10.1117/12.197447}},
  volume       = {{2370}},
  year         = {{1995}},
}