Directive emission of red conjugated polymer embedded within zero index metamaterials

被引：13

作者：

Cao, Tun ^{[1
]}

Zou, Yang ^{[1
]}

Adawi, Ali M. ^{[2
]}

Cryan, Martin J. ^{[3
]}

机构：

[1] Dalian Univ Technol, Dept Biomed Engn, Dalian 116024, Peoples R China

[2] Univ Hull, Dept Phys & Math, Kingston Upon Hull HU6 7RX, N Humberside, England

[3] Univ Bristol, Dept Elect & Elect Engn, Bristol, Avon, England

来源：

OPTICS EXPRESS | 2014年 / 22卷 / 19期

基金：

中国国家自然科学基金;

关键词：

NEGATIVE-REFRACTIVE-INDEX; LIGHT-EMITTING-DIODES; FISHNET METAMATERIALS; EXTRACTION EFFICIENCY; OPTICAL METAMATERIAL; PHASE DELAY; BROAD-BAND; FABRICATION; TRANSMISSION; FREQUENCIES;

D O I：

10.1364/OE.22.022699

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We numerically demonstrate an impedance-matched multilayer stacked fishnet metamaterial that has zero index with flat high transmittance from 600nm to 620nm. The effective refractive index(eta(eff)) is calculated to be -0.045 + 0.466i and the normalize effective impedance( Z(eff)/Z(0)) is 0.956-0.368i at 610nm. The light emitted by a red conjugated polymer layer embedded in such a zero index metamaterial (ZIM) is concentrated in a narrow cone in the surrounding media, where the half-power beam width (HPBW) of the center lobe of the radiation pattern is around 25 degrees in the wavelength range between 600nm and 620nm, giving directive emission in the visible region. This proposed light focusing system can be applied to sensing, beam collimating and filtering functionalities. (C) 2014 Optical Society of America

引用

页码：22699 / 22706

页数：8

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