Peculiar behaviour of optical polarization gratings in light-sensitive liquid crystalline elastomers

Authors/others:Prijatelj, Matej (J Stefan Inst); Ellabban, Mostafa A. (Tanta University); Fally, Martin; Domenici, Valentina (UniversitĂ  degli Studi di Pisa); Copic, Martin (J Stefan Inst); Drevensek-Olenik, Irena (J Stefan Inst)
Abstract:The angular dependence of the diffraction efficiency of volume-type holographic gratings recorded in a single-domain light-sensitive liquid crystalline elastomer was investigated. Usually this dependence is expected to be very similar for intensity gratings and for polarization gratings. However, our measurements resolved a profound difference between the two types of the gratings: a typical Bragg peak of the diffraction efficiency is observed only for intensity gratings, while polarization gratings exhibit a profound dip at the Bragg angle. The appearance of this dip is explained by strongly anisotropic optical absorption of the actinic light during the recording process.
Number of pages:10
Date of publication:1.3.2016
Journal title:Optical Materials Express
Peer reviewed:true
Digital Object Identifier (DOI):
Publication Type:Article