Generation and control of hot spots on commensurate metallic gratings

被引：16

作者：

Barbara, A. ^{[1
,2
]}

Le Perchec, J. ^{[1
,2
]}

Collin, S. ^{[3
]}

Sauvan, C. ^{[3
]}

Pelouard, J-L. ^{[3
]}

Lopez-Rios, T. ^{[1
,2
]}

Quemerais, P. ^{[1
,2
]}

机构：

[1] CNRS, Inst Neel, F-38042 Grenoble 9, France

[2] Univ Grenoble 1, F-38042 Grenoble, France

[3] CNRS, LPN, F-91460 Marcoussis, France

来源：

OPTICS EXPRESS | 2008年 / 16卷 / 23期

关键词：

D O I：

10.1364/OE.16.019127

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We study the light localization on commensurate arrangements of deep metallic sub-wavelength grooves. We theoretically show that as the degree of commensuration tends to an irrational number new light localization states are produced. These have properties close to that reported for hot spots on disordered surfaces and are not permitted for simple period gratings. Existence of these new resonances is experimentally provided in the infra-red region by reflectivity measurements performed on two commensurate samples with respectively two and three slits per period. Manipulations of these hot spots which can be controlled from far-field could be used for high sensitivity spectroscopy applications. (C) 2008 Optical Society of America

引用

页码：19127 / 19135

页数：9

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