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          Institute: MPI für bioanorganische Chemie     Collection: MPI für bioanorganische Chemie     Display Documents



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ID: 18678.0, MPI für bioanorganische Chemie / MPI für bioanorganische Chemie
Growing-In of Optical Coherence in the FMO Antenna Complexes
Authors:Prokhorenko, Valentin I.; Holzwarth, Alfred R.; Nowak, F. R.; Aartsma, T. J.
Language:English
Date of Publication (YYYY-MM-DD):2002
Title of Journal:Journal of Physical Chemistry B
Journal Abbrev.:J. Phys. Chem. B
Volume:106
Issue / Number:38
Start Page:9923
End Page:9933
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:We report on the novel effect of the growing-in of optical coherence in the FMO antenna complexes. The rise of coherence, monitored by femtosecond two-pulse photon echo spectroscopy at 1.27 K, occurs within a characteristic time of 150-250 fs after impulsive excitation at the red edge of the absorption spectrum and is accompanied by strong and long-lasting oscillations. We show that this effect cannot be explained in the framework of present theories for the photon echo formation. To account for the observations, we take into consideration a finite system- bath interaction time and develop the theory beyond the Markov limit. We show that the coherence does not follow the impulsive excitation promptly, instead its time development is delayed. General expressions are obtained for the nonlinear polarization, which can also be applied for analysis of other time-resolved experiments (three-pulse photon echoes, transient grating, transient absorption etc.). Model calculations fully support our experimental observations.
Comment of the Author/Creator:Date: 2002, SEP 26
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für bioanorganische Chemie
External Affiliations:Leiden Univ, Huygens Lab, Dept Biophys, NL-2300 RA Leiden, Netherlands
Identifiers:ISI:000178106700029 [ID No:1]
ISSN:1089-5647 [ID No:2]
DOI:10.1021/jp025758e [ID No:3]
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