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

Matej Prijatelj, Mostafa A. Ellabban, Martin Fally, Valentina Domenici, Martin Čopič, Irena Drevenšek-Olenik
2016 Optical Materials Express  
The angular dependence of the diffraction efficiency of volumetype 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
more » ... e 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.
doi:10.1364/ome.6.000961 fatcat:ioza4xd4njeuxire3gvzpffnce