Honeycomb-lattice plasmonic absorbers at NIR: anomalous high-order resonance

被引：28

作者：

Chen, Yiting ^{[1
]}

Dai, Jin ^{[1
]}

Yan, Min ^{[1
]}

Qiu, Min ^{[1
,2
,3
]}

机构：

[1] Royal Inst Technol KTH, Sch Informat & Commun Technol, S-16440 Kista, Sweden

[2] Zhejiang Univ, State Key Lab Modern Opt Instrumentat, Hangzhou 310027, Zhejiang, Peoples R China

[3] Zhejiang Univ, Inst Adv Nanophoton, Dept Optic Engn, Hangzhou 310027, Zhejiang, Peoples R China

来源：

OPTICS EXPRESS | 2013年 / 21卷 / 18期

基金：

瑞典研究理事会;

关键词：

VISIBLE FREQUENCIES; PERFECT ABSORBER; METAMATERIALS; DESIGN; INDEX; BAND;

D O I：

10.1364/OE.21.020873

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We design, fabricate and characterize a plasmonic honeycomb lattice absorber with almost perfect absorption at 1140 nm over a wide incident angle range. This absorber also possesses a narrow-band, angle-and polarization-dependent high-order resonance in the short-wavelength range, with a bandwidth of 19 nm and angle sensitivity of 3 nm per degree. The nature of this high-order absorption band is analyzed through finite-element simulations. We believe it is due to Bragg coupling of the incident light to the backward-propagating surface plasmon polariton through the periodic modulation of the structure. Such fine absorption bands can find applications in plasmonic sensors and spectrally selective thermal emitters. (C) 2013 Optical Society of America

引用

页码：20873 / 20879

页数：7

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