Miniature circular polarization analyzer with spiral plasmonic lens

被引：187
作者：
Yang, Shuangyang [1 ]
Chen, Weibin [1 ]
Nelson, Robert L. [2 ]
Zhan, Qiwen [1 ]
机构：
[1] Univ Dayton, Electroopt Program, Dayton, OH 45469 USA
[2] USAF, Res Lab, Dayton, OH 45433 USA
来源：
OPTICS LETTERS | 2009年 / 34卷 / 20期
关键词：
EVANESCENT BESSEL BEAM; TRANSMISSION; EXCITATION; RESONANCE; LIGHT;
D O I：
10.1364/OL.34.003047
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
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
引用
收藏
页码：3047 / 3049
页数：3
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