Hybrid spiral plasmonic lens: towards an efficient miniature circular polarization analyzer

被引：26
作者：
Chen, Weibin [1 ]
Rui, Guanghao [1 ]
Abeysinghe, Don C. [2 ,3 ]
Nelson, Robert L. [3 ]
Zhan, Qiwen [1 ]
机构：
[1] Univ Dayton, Electroopt Program, Dayton, OH 45469 USA
[2] Univ Cincinnati, Dept Elect & Comp Engn, Cincinnati, OH 45219 USA
[3] USAF, Res Lab, Dayton, OH 45433 USA
来源：
OPTICS EXPRESS | 2012年 / 20卷 / 24期
关键词：
EVANESCENT BESSEL BEAM;
D O I：
10.1364/OE.20.026299
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A hybrid spiral plasmonic lens that consists of alternating spiral slot and spiral triangular sub-aperture array can differentiate circular polarization of different handedness and enable a miniature circular polarization analyzer design with high efficiency. The improved performance compared to pure spiral slot lens comes from the fact that the hybrid lens is capable of focusing both the radial and the azimuthal polarization components of a circular polarization, doubling the coupling efficiency. In this paper, the spin-dependent plasmonic focusing properties of a spatially arranged triangular sub-aperture array and a hybrid spiral plasmonic lens are demonstrated using a collection mode near field scanning optical microscope. The coupling efficiency could be further improved through optimizing the geometry of the hybrid lens. (C) 2012 Optical Society of America
引用
收藏
页码：26299 / 26307
页数：9
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