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首页> 外文期刊>Applied optics >N-single-helix photonic-metamaterial based broadband optical range circular polarizer by induced phase lags between helices
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N-single-helix photonic-metamaterial based broadband optical range circular polarizer by induced phase lags between helices

机译：基于N-单螺旋光子超材料的螺旋之间的相位滞后的宽带光学范围圆偏振器

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In this work, we have designed a photonic-metamaterial based broadband circular polarizer using N = 4 phase-lagged aluminum single helices arranged in a square array as a unit cell. The effect of phase differences between the helices in an array on the optical performance of the structure is studied, and a comparative study is done with that of multi-intertwined helices. It is observed that the proposed metamaterial structure shows circular polarization sensitivity over a broad optical wavelength range (approximate to 450-900 nm), with improved optical performance in average extinction ratio and broad positive circular dichroism in comparison to multiple intertwined helices. The induced phase lag between the helices in a square-array based unit cell reduces the linear birefringence and leads to the recovery of circular space symmetry in the structure. (C) 2015 Optical Society of America
机译：在这项工作中，我们设计了一种以光子-材料为基础的宽带圆偏振器，它使用以正方形阵列排列的N = 4个相位滞后的铝单螺旋作为单位晶胞。研究了阵列中螺旋之间的相位差对结构的光学性能的影响，并与多股螺旋进行了比较研究。观察到，提出的超材料结构在较宽的光学波长范围内（约450-900 nm）显示出圆偏振灵敏度，与多个相互缠绕的螺旋相比，在平均消光比和较宽的正圆二色性方面具有改进的光学性能。在基于正方形阵列的晶胞中，螺旋之间的诱导相位滞后会降低线性双折射，并导致结构中圆形空间对称性的恢复。 （C）2015年美国眼镜学会

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