Total light absorption in a wide range of incidence by nanostructured metals without plasmons

被引：29

作者：

Bonod, Nicolas ^{[1
]}

Popov, Evgeny ^{[1
]}

机构：

[1] Aix Marseille Univ, CNRS, Inst Fresnel, UMR 6133, F-13397 Marseille, France

来源：

OPTICS LETTERS | 2008年 / 33卷 / 20期

关键词：

D O I：

10.1364/OL.33.002398

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Metals structured by nanocavities have recently been demonstrated to efficiently absorb light in a wide range of angles of incidence. It has been assumed that nanovoid plasmons are at the origin of the strong absorption. It is shown that it is possible to totally absorb incident light without plasmons. To avoid their excitation, a diffraction grating consisting of cylindrical cavities in a metallic substrate is illuminated in transverse electric polarization. It is found that cylindrical cavities can sustain cavity resonances with a high enhancement of the light intensity, provoking a total absorption of light in a wide range of incidence. (C) 2008 Optical Society of America

引用

页码：2398 / 2400

页数：3

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