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

Toenu Pullertis; M. Chachisvilis; I. I. Fedchenia; M. R. Jones; C. N. Hunter; Sven Larsson; Villy Sundstrom

doi:10.1117/12.197447

2 January 1995 Coherent nuclear motion and exciton state dynamics in photosynthetic light-harvesting pigment proteins

Toenu Pullertis, M. Chachisvilis, I. I. Fedchenia, M. R. Jones, C. N. Hunter, Sven Larsson, Villy Sundstrom

Proceedings Volume 2370, 5th International Conference on Laser Applications in Life Sciences; (1995) https://doi.org/10.1117/12.197447
Event: Laser Applications in Life Sciences: 5th International Conference, 1994, Minsk, Belarus

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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Toenu Pullertis, M. Chachisvilis, I. I. Fedchenia, M. R. Jones, C. N. Hunter, Sven Larsson, and Villy Sundstrom "Coherent nuclear motion and exciton state dynamics in photosynthetic light-harvesting pigment proteins", Proc. SPIE 2370, 5th International Conference on Laser Applications in Life Sciences, (2 January 1995); https://doi.org/10.1117/12.197447

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