光折变材料全息图形成过程中的吸收调制

Topical Meeting on Photorefractive Materials, Effects, and Devices II Pub Date : 1900-01-01 DOI:10.1364/pmed.1990.bp1

A. Knyazkov, M. N. Lobanov

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摘要

已经发现，一些光折变材料，如GaAs和BaTiO3，在全息光栅的吸收系数和吸收成分的存在上表现出强度依赖性[1,2]。我们在之前的论文[3]中已经表明，由于吸收中心的空间再分布，光折变介质中全息图的形成具有振幅-相位特征。为了进行分析，我们使用了具有一种光活性中心的能带模型。

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Absorption Modulation Under Hologram Formation in Photorefractive Materials

It has been found, that some photorefractive materials, such as GaAs and BaTiO3, exhibit an intensity dependence in the absorption coefficient and the presense of absorption component of hologram grating [1,2]. We have shown in our previous paper [3], that hologram formation in photorefractive media has an amplitude - - phase character due to spatial redistribution of absorptive centres. For analysis we have used a band model with one type of photoactive centres.

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来源期刊

$Topical Meeting on Photorefractive Materials, Effects, and Devices II$

Topical Meeting on Photorefractive Materials, Effects, and Devices II

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