Broadband epsilon-near-zero metamaterials with steplike metal-dielectric multilayer structures

被引：32
|
作者：
Sun, Lei [1 ]
Gao, Jie [1 ]
Yang, Xiaodong [1 ]
机构：
[1] Missouri Univ Sci & Technol, Dept Mech & Aerosp Engn, Rolla, MO 65409 USA
来源：
PHYSICAL REVIEW B | 2013年 / 87卷 / 16期
关键词：
REFRACTIVE-INDEX;
D O I：
10.1103/PhysRevB.87.165134
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The concept of the broadband epsilon-near-zero meta-atom consisting of layered stacks with specified metallic filling ratio and thickness is proposed based on the Bergman spectral representation of the effective permittivity. The steplike metal-dielectric multilayer structures are designed to achieve realistic broadband epsilon-near-zero meta-atoms in optical frequency range. These meta-atoms can be integrated as building blocks for unconventional optical components with exotic electromagnetic properties over a wide frequency range, such as the demonstrated broadband directional emission and phase front shaping. DOI: 10.1103/PhysRevB.87.165134
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页数：6
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