Properties of diffraction gratings holographically recorded in poly(ethylene glycol)dimethacrylate-ionic liquid composites

Authors/others:Ellabban, Mostafa A. (Tanta University); Glavan, Gaspar (Institut Jozef Stefan); Flauger, Peter (Universität Wien); Klepp, Jürgen; Fally, Martin
Abstract:We investigated recording and readout of transmission gratings in composites of poly(ethylene glycol) dimethacrylate (PEGDMA) and ionic liquids (IL) in detail. Gratings were recorded using a two-wave mixing technique for different grating periods, exposures and a series of film thicknesses. The recording kinetics as well as the post-exposure behavior of the gratings were studied by diffraction experiments. We found that - depending on the parameters - different grating types (pure phase or mixed) are generated, and at elevated thicknesses strong light-induced scattering develops. Gratings with thicknesses up to 85 micrometers are of the required quality with excellent optical properties, thicker gratings exhibit strong detrimental light-induced scattering. The obtained results are particularly valuable when considering PEGDMA-ionic liquid composites for applications as e.g., holographic storage materials or as neutron optic diffractive elements.
Date of publication:15.5.2017
Publication Series:Proceedings of SPIE, SPIE-INT SOC OPTICAL ENGINEERING, vol. 10233, 0277-786X,
Publication Type:Contribution to proceedings
Host publication's title:Holography: Advances and Modern Trends V