Color animation by dielectric metasurface hologram made of silicon nanopillar
Color animation by dielectric metasurface hologram made of silicon nanopillar
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由硅纳米柱制成的介电超表面全息图的彩色动画
DOI：
10.1109/metamaterials52332.2021.9577126
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Iwami Kentaro
中科院分区：
文献类型：
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作者：
Yamada Naoyuki;Ikezawa Satoshi;Iwami Kentaro
采用由硅纳米柱组成的介电超表面全息图，在445、532、633 nm波长处设计并演示了多色全息动画。每个硅柱作为波导，根据宽度和高度产生相位延迟。采用有限元法计算柱体的相位延迟和透光率，并将其映射为用迭代傅里叶变换算法计算的全息图的相位分布。采用电子束光刻技术在蓝宝石上硅衬底上制备全息图。在波长为445、532、633 nm的激光照射下，成功地再现了全息电影。
A multicolor holographic animation was designed and demonstrated by using dielectric metasurface hologram that consists of silicon nanopillars at the wavelengths of 445, 532, 633 nm. Each silicon pillar acts as a waveguide to produce phase delay depending on the width and height. Phase delay and transmittance of pillars are calculated by using finite element method and mapped to express phase distribution of a hologram calculated from the iterative Fourier transform algorithm. The hologram is fabricated on a silicon on sapphire (SOS) substrate by electron beam lithography. The holographic movie was successfully reproduced by laser illumination at the wavelengths of 445, 532, 633 nm.