3-吲哚苯基富尔胺/PMMA薄膜的偏振全息

Neimule Menke, Baoli Yao, Yingli Wang, Yi Chen
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引用次数: 4

摘要

材料的光致变色和光各向异性特性可分别用于普通全息记录和偏振全息记录。Fulgides是众所周知的热不可逆有机光致变色化合物。结果表明,掺氟化镓聚合物薄膜存在光致各向异性。本文研究了一种3-吲哚苯基富尔胺/PMMA薄膜作为全息存储介质。首先,测量或计算样品的光致变色和光各向异性的光谱和动力学特性。其次,测量了该样品所记录的4种不同偏振全息图在633 nm处的衍射效率动态。最大DE值约为1%。第三,对DE谱和DE动力学进行了详细的理论计算,发现理论推导的DE动力学曲线与实测实验曲线具有良好的相关性。从DE光谱可知,在波长小于450 nm或大于700 nm时,可以实现无损读取。实验得到的DWPS与理论推导的DWPS一致,说明在正交偏振全息中,衍射光的偏振态与重构光的偏振态是正交的,这对提高全息存储的信噪比是非常重要的。并将这些结果应用于高密度全息图像存储实验,证明了这些结果是正确的。得到了比特/平方厘米的面积密度,并准确地检索了编码后的数据。
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Polarization Holography in 3-Indoly-Benzylfulgimide/PMMA Film
The photochromic and photoanisotropic properties of materials can be used in ordinary and polarization holographic recording respectively. Fulgides are well known as thermally irreversible organic photochromic compounds. And it is found that there exists photoinduced anisotropy in fulgide-doped polymeric films. In this report, a 3-indoly-benzylfulgimide/PMMA film was studied as a holographic storage media. First, the spectra and dynamics of photochromic and photoanisotropic properties of the sample are measured or calculated. Second, the diffraction efficiency (DE) dynamics at 633 nm of four kinds of different polarization holograms recorded in this sample are measured. The maximum DE value about 1% was gotten. Third, the DE spectra and DE dynamics are theoretically calculated in detail, and a good correlation of theoretically derived DE dynamic curves and the measured experimental curves was found. From the DE spectra, it is known that at the wavelengths less than 450 nm or greater than 700 nm, the nondestructive reading can be realized. The DWPS obtained in the experiments are same with the theortically deduced ones, which shows that in the orthogonal polarization holography, the polarization state of the diffracted light is orthogonal to that of the reconstruction light, which is very important to increase the SNR of the holographic storage. And all these results are applied and proved to be correct in high-density holographic image storage experiment. The area density of bits/cm2 was obtained, and the encoded data was retrieved without error.
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