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近十年来,硫系非晶态薄膜的光存贮效应引起了人们的广泛兴趣。这种光存贮效应被归结为薄膜光学性质的光致变化。已经发现许多硫系非晶态薄膜的光学性质(光吸收限与折射率)随光照或加热而变。As_2S_3膜是具有这种特性的典型代表。已经用X-射线衍射、拉曼光谱实验揭示,伴随着光学性质的光致变化与热致变化,As_2S_3膜发生着结构变化。近来,
In the past ten years, the optical storage effect of the sulfur-based amorphous thin film has aroused widespread interest. This optical storage effect is attributed to the photo-induced changes in the optical properties of the film. It has been found that the optical properties (light absorption limit and refractive index) of many sulfur-based amorphous thin films vary with light or heat. As 2 S 3 film is a typical representative of this property. It has been revealed by X-ray diffraction and Raman spectroscopy that the As 2 S 3 film undergoes structural changes accompanied by the photodissociation and thermal induced change of optical properties. recently,