一种核黄素敏化的宽带全息记录材料

制备了一种核黄素敏化的以聚乙烯醇为基质的新型全息存储材料,并研究了材料的全息特性.用Ar+激光器激发的488 nm的蓝光对材料曝光,结果表明该材料具有较高的衍射效率和曝光灵敏度,衍射效率高达53%,灵敏度为3.3 cm2/J,折射率调制度为4.5×10－4.研究了材料的透过率与随时间和入射角度变化的关系,说明在曝光记录过程中有噪音光栅生成.在存储介质膜中存储了全息图像,再现图像较为清晰,说明该材料适合用作高密度全息存储介质.

A Novel Riboflavin Sensitized Broadband Photopolymer For Holographic Recording

A novel riboflavin sensitized photopolymer material based on polyvinyl-alcohol for holographic storage was fabricated,and the holographic characteristics were investigated.The material was exposed by using Ar+ laser with 488 nm.The experimental results indicate that it has high diffraction efficiency and sensitivity.The maximum diffraction efficiency is 53% and sensitivity is about 3.3 cm2/J.The modulation index is as high as 4.5×10－4.The relationships of transmittance dependent on exposure times and scan angle were discussed,respectively.The presence of noise gratings of exposure process was demonstrated.Holograms were recorded in the material and the images can be reconstructed clearly.It is found that the photopolymer material is suitable for high-density volume holographic storage.