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Holographic technique of generating large-size mask with hexagonal pattern for photonic crystal LED fabrication

机译:用于制造光子晶体LED的具有六边形图案的大尺寸掩模的全息技术

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A simple optical system for generating large-size hexagonal lattice used as the mask for photonic crystal LED fabrication is proposed. The key element in the system is a holographic diffractive optical element consisting of three phase gratings made with holographic means. Under the illumination of a single plane wave, three plane waves can be generated and interfere to form a uniform hexagonal pattern. Theoretical analysis demonstrates that equal intensity of the three plane waves can be obtained if groove depth of the gratings is about 400 nm, which can be achieved by controlling the development time in grating processing. Mask on LED with lattice area up to 15 cm~2 has been obtained with the method.
机译:提出了一种简单的光学系统,用于生成用作光子晶体LED制造的掩模的大尺寸六边形晶格。该系统中的关键元件是全息衍射光学元件,其由用全息装置制成的三相光栅组成。在单个平面波的照射下,可以产生三个平面波并干涉形成均匀的六边形图案。理论分析表明,如果光栅的凹槽深度约为400 nm,则可以得到三个平面波的强度相等,这可以通过控制光栅加工中的显影时间来实现。该方法获得了在LED上的晶格面积最大为15 cm〜2的掩模。

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