Three-pulse photon echo of an excitonic dimer modeled via Redfield theory

被引：31

作者：

Kjellberg, P ^{[1
]}

Pullerits, T ^{[1
]}

机构：

[1] Lund Univ, Dept Phys Chem, S-22100 Lund, Sweden

来源：

JOURNAL OF CHEMICAL PHYSICS | 2006年 / 124卷 / 02期

关键词：

D O I：

10.1063/1.2150447

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：

In this article the third-order response of an excitonically coupled dimer is studied. The three-pulse photon echo signals were calculated by extracting polarization components from the total polarization in the corresponding phase-matched directions. The total nonlinear response was obtained by numeric propagation of the density matrix, with the exciton-vibrational coupling modeled via Redfield relaxation theory. The full two-dimensional three-pulse photon echo signals and the peak shift were analyzed in terms of the density-matrix dynamics of coherence dephasing and population relaxation. The location of the two-exciton state was found to be essential for proper modeling of the three-pulse photon echo. In particular, an oscillation in the three-pulse photon echo peak shift is found if the two-exciton state is displaced. The oscillations can be related to the dynamics of the one-exciton coherences. (c) 2006 American Institute of Physics.

引用

页数：9

共 48 条

[1] Three pulse photon echo peak shift study of the B800 band of the LH2 complex of Rps. acidophila at room temperature:: A coupled master equation and nonlinear optical response function approach [J].