Tunable directional beaming from subwavelength metal slits with metal-dielectric composite surface gratings

被引：52

作者：

Kim, Hwi

Park, Junghyun

Lee, Byoungho ^{[1
]}

机构：

[1] Seoul Natl Univ, Natl Creat Res Ctr Act Plasmon Applicat Syst, Interuniv Semicond Res Ctr, Seoul 151744, South Korea

来源：

OPTICS LETTERS | 2009年 / 34卷 / 17期

基金：

新加坡国家研究基金会;

关键词：

D O I：

10.1364/OL.34.002569

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A structure for surface-plasmon-polariton mediated directional off-axis beaming with a dynamic tunability of radiation direction is proposed. The key finding in this Letter is that properly designed metal-dielectric composite grating structures surrounding subwavelength metal slit produce a dynamically tunable off-axis beaming effect with variation of the grating permittivity value. The controllability of beam direction by the grating permittivity value opens a way to develop active plasmonic devices based on the beaming effect. (C) 2009 Optical Society of America

引用

页码：2569 / 2571

页数：3

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