Silver-doped photopolymer media for holographic recording

Abstract

Incorporation of silver ions into a dye-sensitized poly(vinyl alcohol)/acrylamide photopolymer is observed to give better performance compared to other metal-ion-doped photopolymer holographic recording media. Plane-wave transmission gratings were recorded in the photopolymer films using a He-Ne laser, and various holographic parameters were optimized so as to explore maximum potential of the material for various holographic applications. Silver-doped films showed good energy sensitivity, and gratings recorded in optimized film exhibited a diffraction efficiency of more than 75%. The potential of the material for holographic data storage applications is also studied using peristrophic multiplexing.

Современное Состояние Разработки Светочувствительных Сред Для Голографии (Обзор)

“…Ио-ны Ag + , используемые в качестве сшивающего ре-агента, позволяют регистрировать пропускающие го-лограммы высокого качества в реальном времени в ПВА/акриламидной композиции [72]. Для регистрации голограмм с ДЭ= 70% энергетические затраты излуче-ния гелий-неонового лазера составляли 10 mJ/cm 2 [73].…”

Voltage Effect in Holograms of Polyvinyl Alcohol with FeCl3

“…To date, polymeric materials, such as poly(methyl methacrylate), poly(vinyl alcohol) (PVA), and others, have been widely investigated for holographic applications [1][2][3].…”

“…This manuscript presents an investigation of the optical and electrical properties of FeCl 3 -PVA samples with varied concentrations of FeCl 3 .…”

Effect of concentration of DYE on the storage life of plane wave gratings on photopolymer film

“…Previously our research group has successfully recorded holographic gratings in acrylamide incorporated poly (vinyl alcohol) film with a diffraction efficiency (DE) of 70% with an exposure energy of 125 mJ/cm 2 , having a dye concentration of 2.09 Â 10 À4 M, but a gradual decrease in diffraction efficiency was observed on storage. 9 The reason for the decrease may be due to the diffusion of residual dye molecules from destructive region to constructive region and by the instability of leuco form of the dye molecule. 8 Doping with ammonium dichromate and copper chloride, resulted in good storage life with low diffraction efficiency.…”

“…But Pramitha et al has reported that by using silver ion as a crosslinker, a diffraction efficiency of 75% could be achieved with an exposure energy of 80 mJ/cm 2 and it remained as 50% even after 1 year. 9 In order to study the storage life of the material in the absence of metal ions, the dye concentration was reduced from 2.09 Â 10 À4 M and concentration was optimized by recording gratings at different exposure energies. Surprisingly, good diffraction efficiency and storage life was obtained for a dye concentration of 1.4 Â 10 À4 M. From this result, the role of dye molecules on the material's storage life was clear.…”