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Polarization-dependent circular Dammann grating made of azo-dye-doped liquid crystals

机译:由偶氮染料掺杂的液晶制成的偏振相关的圆形达曼光栅

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摘要

A polarization-dependent circular Dammann grating (CDG) was generated from an azo-dye-doped liquid crystal (LC) cell. A simple multiexposure photo-alignment process was used to fabricate a binary phase LC CDG zone plane, which was composed of an odd zone with a twisted nematic LC structure and an even zone with a homogenous LC structure. A two-order CDG with equal-intensity rings was produced through a Fourier transform. The maximum zeroth and first diffraction orders of obtained CDG can be separately achieved by rotating the analyzer's polarization direction. The CDG using an azodye-doped LC cell can be used to generate diffractions by lasers in a broad wavelength range, hence expanding possible device applications.
机译:从偶氮染料掺杂的液晶(LC)单元生成了偏振相关的圆形达曼光栅(CDG)。一个简单的多重曝光光取向工艺被用于制造二元相LC CDG区域平面,该平面由扭曲的向列LC结构的奇数区和同质LC结构的偶数区组成。通过傅立叶变换产生具有等强度环的二阶CDG。可以通过旋转分析仪的偏振方向分别获得获得的CDG的最大零级和一级衍射级。使用掺有偶氮染料的LC池的CDG可用于在宽波长范围内通过激光产生衍射,从而扩展了可能的器件应用。

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