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Materials 2012, 5(5), 741-753; doi:10.3390/ma5050741
Article

Kinetics of Holographic Recording and Spontaneous Erasure Processes in Light-Sensitive Liquid Crystal Elastomers

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Received: 20 February 2012; in revised form: 16 March 2012 / Accepted: 22 March 2012 / Published: 25 April 2012
(This article belongs to the Special Issue Advanced Materials for Modern Holographic Applications)
Download PDF [650 KB, uploaded 25 April 2012]
Abstract: The optical mechanism for imprinting one-dimensional grating structures into thin films of a light-sensitive monodomain liquid crystal elastomer is investigated by analyzing the time dependence of optical diffraction properties. The recording kinetics shows an irregular oscillatory behavior, which is most expressed at small grating spacings and at temperatures close to the nematic-isotropic phase transition. The oscillations are attributed to the opto-mechanical response of the film, i.e., to contraction of the film during the recording process. At temperatures far below the nematic-isotropic phase transition, the spontaneous erasure kinetics exhibits exponential relaxation with relaxation time following the Arrhenius activation law. However, at temperatures close to the nematic-isotropic phase transition, the erasure process shows an interesting nonmonotonic behavior that we attribute to the non-linear relation between the concentration of the photo-transformed chemical groups and the nematic order parameter.
Keywords: liquid crystal elastomers; light-sensitive materials; holographic lithography; optical microstructuring; recording kinetics liquid crystal elastomers; light-sensitive materials; holographic lithography; optical microstructuring; recording kinetics
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Gregorc, M.; Li, H.; Domenici, V.; Ambrožič, G.; Čopič, M.; Drevenšek-Olenik, I. Kinetics of Holographic Recording and Spontaneous Erasure Processes in Light-Sensitive Liquid Crystal Elastomers. Materials 2012, 5, 741-753.

AMA Style

Gregorc M, Li H, Domenici V, Ambrožič G, Čopič M, Drevenšek-Olenik I. Kinetics of Holographic Recording and Spontaneous Erasure Processes in Light-Sensitive Liquid Crystal Elastomers. Materials. 2012; 5(5):741-753.

Chicago/Turabian Style

Gregorc, Marko; Li, Hui; Domenici, Valentina; Ambrožič, Gabriela; Čopič, Martin; Drevenšek-Olenik, Irena. 2012. "Kinetics of Holographic Recording and Spontaneous Erasure Processes in Light-Sensitive Liquid Crystal Elastomers." Materials 5, no. 5: 741-753.


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