Generating Far-Field Orbital Angular Momenta from Near-Field Optical Chirality

被引：126
|
作者：
Gorodetski, Yuri [1 ,2 ]
Drezet, Aurelien [3 ,4 ]
Genet, Cyriaque [1 ,2 ]
Ebbesen, Thomas W. [1 ,2 ]
机构：
[1] Univ Strasbourg, ISIS, F-67000 Strasbourg, France
[2] CNRS, UMR 7006, F-67000 Strasbourg, France
[3] CNRS, Inst Neel, F-38000 Grenoble, France
[4] Univ Grenoble 1, UPR 2940, F-38000 Grenoble, France
来源：
PHYSICAL REVIEW LETTERS | 2013年 / 110卷 / 20期
关键词：
SURFACE-PLASMONS;
D O I：
10.1103/PhysRevLett.110.203906
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We demonstrate orbital angular momentum (OAM) transfer by chiral plasmonic nanostructures designed on both sides of a thin suspended metallic membrane. We show how far-field vortex beams with tunable OAM indices can be tailored through nanostructure designs. We reveal the crucial role played by the central aperture that connects the two sides of the membrane from which OAM selection rules are derived in perfect agreement with experimental data.
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页数：5
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