3RD-ORDER OPTICAL-RESPONSE OF MOLECULAR AGGREGATES - DISORDER AND THE BREAKDOWN OF SIZE-ENHANCEMENT

被引：51

作者：

KNOESTER, J

机构：

[1] Chemical Physics, University of Groningen, 9747 AG Groningen

来源：

CHEMICAL PHYSICS LETTERS | 1993年 / 203卷 / 04期

关键词：

D O I：

10.1016/0009-2614(93)85583-A

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：

The third-harmonic generation and nonlinear absorption of linear molecular aggregates with energetic disorder are numerically simulated. A comparison is made between the local-field approximation (LFA) and exact response theory, and it is shown that the validity of the LFA does not improve in the presence of energetic disorder ranging up to the intermolecular interaction. The breakdown of size-enhancement of optical nonlinearities caused by energetic disorder is investigated and scaling laws relating the nonlinear response to the delocalization range of the exciton states are obtained.

引用

页码：371 / 377

页数：7

共 24 条

[1] NONLINEAR OPTICAL SUSCEPTIBILITIES OF POLYSILANES - EXCITON EFFECT [J].