Total absorption of light by lamellar metallic gratings

被引：91

作者：

Bonod, Nicolas ^{[1
]}

Tayeb, Gerard ^{[1
]}

Maystre, Daniel ^{[1
]}

Enoch, Stefan ^{[1
]}

Popov, Evgeny ^{[1
]}

机构：

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

来源：

OPTICS EXPRESS | 2008年 / 16卷 / 20期

关键词：

D O I：

10.1364/OE.16.015431

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Lamellar gratings illuminated in conical (off-plane) mounting can achieve with suitable optogeometrical parameters (grating profile, angle of incidence and wavelength) a total absorption of light for any polarization provided there is only the zeroth propagating order. A detailed analysis shows that electromagnetic resonances are involved and their nature strongly depends on the polarization. When the incident electric field is parallel to the cross-section of the grating, the resonance is provoked by the excitation of surface plasmons. For the orthogonal polarization, total absorption occurs for deep gratings only, when the grooves behave like resonant optical cavities. It is possible to reduce the optimal grating height by filling the grooves with a high refractive index material. (C) 2008 Optical Society of America

引用

页码：15431 / 15438

页数：8

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