Non-perturbative calculation of 2D spectra in heterogeneous systems:: Exciton relaxation in the FMO complex

被引:57
作者
Bruggemann, Ben [1 ]
Kjellberg, Par [1 ]
Pullerits, Tonu [1 ]
机构
[1] Lund Univ, Dept Chem Phys, S-22100 Lund, Sweden
关键词
D O I
10.1016/j.cplett.2007.07.002
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Experimental 2D frequency resolved spectra showing the relaxation of excitons in the photosynthetic antenna system FMO are reproduced by a multi-exciton density matrix approach explicitly including the external fields. The interference of the polarizations of a number of randomly placed, rotated and energetically inhomogencous complexes is used to extract the signal in the phase matching directions. It is shown that varying the laser intensity has only a minor impact, but changing the phase within the single pulses makes higher order contributions possible which lead to a fundamental change of the 2D spectra. (C) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码:192 / 196
页数:5
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