Spiral plasmonic nanoantennas as circular polarization transmission filters

被引：71

作者：

Bachman, K. A. ^{[1
]}

Peltzer, J. J. ^{[1
]}

Flammer, P. D. ^{[1
]}

Furtak, T. E. ^{[1
]}

Collins, R. T. ^{[1
]}

Hollingsworth, R. E. ^{[2
]}

机构：

[1] Colorado Sch Mines, Dept Phys, Golden, CO 80401 USA

[2] ITN Energy Syst Inc, Littleton, CO 80127 USA

来源：

OPTICS EXPRESS | 2012年 / 20卷 / 02期

关键词：

IMAGERY;

D O I：

10.1364/OE.20.001308

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present simulation and experimental results for easily fabricated spiral plasmonic antenna analogues providing circular polarization selectivity. One circular polarization state is concentrated and transmitted through a subwavelength aperture, while the opposite circular state is blocked. The spectral bandwidth, efficiency, and extinction ratios are tunable through geometric parameters. Integration of such structures onto a focal plane array in conjunction with linear micropolarizers enables complete Stokes vector imaging, that, until now, has been difficult to achieve. An array of these structures forms a plasmonic metamaterial that exhibits high circular dichroism. (C) 2012 Optical Society of America

引用

收藏

页码：1308 / 1319

页数：12

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