Fabrication of Computer Generated Holograms on Metal Ion Doped Polymer Systems by Contact Copying

Computer Generated Holograms (CGHs) are attractive devices because of their capabilities to reconstruct a wavefront defined by mathematical relations. They are promising display, interconnects, multiplexing, fan-in and fan-out but the cost of producing one efficient element is again prohibitive. We are developing simple techniques of fabrication of CGHs on real-time recording materials. Cr(VI) and Fe(III) doped poly(vinyl alcohol) and poly(acrylic acid) systems have been used as real-time recording media for volume transmission and reflection holograms in our laboratory. For some years, we have worked on improving the performance of these materials by studying the reaction scheme of photo-crosslinking that is evolved in the formation of the grating and by systematically evaluating the holographic characteristics of each material under different experimental conditions such as different dyes, pH and concentrations[1,2,3]. These studies can show the way to change the chemical components of the layer to speed up the reaction in solid matrix.