Miniature circular polarization analyzer with spiral plasmonic lens
Miniature circular polarization analyzer with spiral plasmonic lens
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DOI：
10.1364/ol.34.003047
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发表时间：
2009-10-15
期刊：
影响因子：
3.6
通讯作者：
Zhan, Qiwen
中科院分区：
文献类型：
--
作者：
Yang, Shuangyang;Chen, Weibin;Zhan, Qiwen
对一个简单的螺旋等离子体透镜进行了解析和数值研究。由于几何相位效应，螺旋等离子体激元透镜将左旋和右旋圆偏振聚焦成空间分离的等离子体激元场。这种场分布的空间多路复用用于微型圆偏振分析器设计。一个圆偏振消光比优于100是可获得的设备尺寸小到4 λ（SPP）。螺旋等离子体激元透镜提供高效的等离子体激元聚焦，同时消除了将入射光束居中到等离子体激元透镜的要求，使其适合于全斯托克斯参数偏振成像应用。(C)2009年美国光学学会
A simple spiral plasmonic lens is studied both analytically and numerically. Owing to the geometric phase effect, a spiral plasmonic lens focuses the left-hand and right-hand circular polarizations into spatially separated plasmonic fields. Such a spatial multiplexing of the field distribution is utilized in miniature circular polarization analyzer design. A circular polarization extinction ratio better than 100 is obtainable with a device size as small as 4 lambda(spp). The spiral plasmonic lens provides efficient plasmonic focusing while it eliminates the requirement of centering the incident beam to the plasmonic lens, making it suitable for full Stokes parameter polarimetric imaging applications. (C) 2009 Optical Society of America