The effects of orientational and energetic disorder on Forster energy migration along a one-dimensional lattice

被引：39

作者：

Ahn, Tai-Sang

Wright, Nicholas

Bardeen, Christopher J. ^{[1
]}

机构：

[1] Univ Calif Riverside, Dept Chem, Riverside, CA 92521 USA

[2] Univ Calif San Diego, San Diego Supercomp Ctr, La Jolla, CA 92093 USA

来源：

CHEMICAL PHYSICS LETTERS | 2007年 / 446卷 / 1-3期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/j.cplett.2007.08.003

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：

Numerical simulations of exciton migration along a one-dimensional lattice via Forster energy transfer are reported. The roles of static Gaussian energetic disorder and transition dipole orientational disorder are investigated. Both disorder mechanisms result in subdiffusive behavior during the initial phase of energy migration, tending asymptotically to normal diffusion. The dependence of the subdiffusion parameters on the inhomogeneous linewidth and intersite spacing is examined. Depending on the exciton lifetime, subdiffusive motion may dominate the exciton displacement behavior, and it becomes problematic to use normal diffusion theory to make even qualitative predictions about the exciton motion. (C) 2007 Elsevier B.V. All rights reserved.

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页码：43 / 48

页数：6

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