Gold helix photonic metamaterials: A numerical parameter study

被引：199

作者：

Gansel, Justyna K. ^{[1
,2
]}

Wegener, Martin ^{[1
,2
,3
]}

Burger, Sven ^{[4
,5
]}

Linden, Stefan ^{[1
,2
,3
]}

机构：

[1] Karlsruhe Inst Technol, Inst Angew Phys, D-76128 Karlsruhe, Germany

[2] Karlsruhe Inst Technol, DFG Ctr Funct Nanostruct, D-76128 Karlsruhe, Germany

[3] Karlsruhe Inst Technol, Inst Nanotechnol, D-76344 Eggenstein Leopoldshafen, Germany

[4] Zuse Inst Berlin, D-14195 Berlin, Germany

[5] DFG Forschungszentrum Matheon, D-10623 Berlin, Germany

来源：

OPTICS EXPRESS | 2010年 / 18卷 / 02期

关键词：

POLARIZATION; CRYSTALS; DESIGN;

D O I：

10.1364/OE.18.001059

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We have recently shown that metamaterials composed of three-dimensional gold helices periodically arranged on a square lattice can be used as compact "thin-film" circular polarizers with one octave bandwidth. The physics of the motif of these artificial crystals is closely related to that of microwave sub-wavelength helical antennas in end-fire geometry. Here, we systematically study the dependence of the metamaterial's chiral optical properties on helix pitch, helix radius, two-dimensional lattice constant, wire radius, number of helix pitches, and angle of incidence. Our numerical calculations show that the optical properties are governed by resonances of the individual helices, yet modified by interaction effects. Furthermore, our study shows possibilities and limitations regarding performance optimization. (C) 2010 Optical Society of America

引用

页码：1059 / 1069

页数：11

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