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  • Title: Nonlinear photoresponse of disordered elastomers.
    Author: Corbett D, Warner M.
    Journal: Phys Rev Lett; 2006 Jun 16; 96(23):237802. PubMed ID: 16803406.
    Abstract:
    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.
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