Nonlinear photoresponse of disordered elastomers

被引：79

作者：

Corbett, D. ^{[1
]}

Warner, M. ^{[1
]}

机构：

[1] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 23期

关键词：

D O I：

10.1103/PhysRevLett.96.237802

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We model the polarization-dependent photocontractions of polydomain nematic elastomers. Contraction initially arises by light-induced director rotation. At higher light intensity, strain recovers because the local order parameter diminishes. Thus we predict photostrains to be nonmonotonic with light intensity and predict the induction of a negative global order parameter for the system of polydomains. Nonmonotonic strains would give curvature reversal in thick samples. Our model also predicts an elongational strain response to nonpolarized light.

引用

页数：4