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首页> 外文期刊>Optics Communications: A Journal Devoted to the Rapid Publication of Short Contributions in the Field of Optics and Interaction of Light with Matter >Peculiarities of the spontaneous grating formation in light-sensitive waveguide films near a magic angle of laser beam incidence
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Peculiarities of the spontaneous grating formation in light-sensitive waveguide films near a magic angle of laser beam incidence

机译:接近入射光束幻角的光敏波导膜中自发光栅形成的特殊性

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摘要

We investigated generation and competition of spontaneous gratings in thin light-sensitive AgCl-Ag films under irradiation by P-polarized laser beam. The incidence angles used were close to the "magic" angle at which a strong diffraction beam appears to propagate against the incident beam. A considerable increase of number of dominant grating types was revealed at angles close to the magic one while the strong regular S_-grating is formed at exact magic angle. It is the result of TE- and TM-mode scattering conditions favourable to various cases of double Bragg's diffraction. At the magic angle, gratings of several types merge into single S_-grating.
机译:我们研究了在P偏振激光束照射下感光AgCl-Ag薄膜中自发光栅的产生和竞争。所使用的入射角接近于“魔术”角,在该“强”角处强衍射束似乎相对于入射束传播。在接近魔术角的角度显示出显着增加的主导光栅类型的数量,而在精确的魔术角处形成了强大的规则S_光栅。它是TE和TM模散射条件的结果,适合于各种双布拉格衍射的情况。在魔术角度,几种类型的光栅合并为单个S_光栅。

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