Tailoring Orbital Angular Momentum of Light in the Visible Domain with Metallic Metasurfaces

被引：59

作者：

Hakobyan, Davit ^{[1
,2
]}

Magallanes, Hernando ^{[1
]}

Seniutinas, Gediminas ^{[2
]}

Juodkazis, Saulius ^{[2
]}

Brasselet, Etienne ^{[1
]}

机构：

[1] Univ Bordeaux, CNRS, UMR 5798, Lab Ondes & Mat Aquitaine, F-33400 Talence, France

[2] Swinburne Univ Technol, Ctr Microphoton, John St, Hawthorn, Vic 3122, Australia

来源：

ADVANCED OPTICAL MATERIALS | 2016年 / 4卷 / 02期

基金：

澳大利亚研究理事会;

关键词：

DIELECTRIC METASURFACES; OPTICAL-ELEMENTS; LASER MODES; BEAMS; GENERATION; CONVERSION; CRYSTALS; NANOSLIT;

D O I：

10.1002/adom.201500494

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Submicron-thick gold films endowed with subwavelength patterning allow on-demand topological shaping of light, hence the precise delivery of optical orbital angular momentum. Several kinds of metallic metasurfaces enabling the generation of optical vortices with arbitrary topological charges in the visible domain are fabricated following a design based on space-variant subwavelength grating with discrete orientational distribution. The optical performances of obtained flat spin-orbit optical elements designed to operate at 532 nm wavelength are experimentally assessed and satisfactorily compared to expectations. About 80% of optical vortex generation purity for predetermined topological charge up to vertical bar l vertical bar = 10 is achieved. Other designs that allow continuous orientational distribution of nanogratings as well as the superposition of orbital angular momentum states are also proposed.

引用

页码：306 / 312

页数：7

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