Negative phase advance in polarization independent, multi-layer negative-index metamaterials

被引：38
|
作者：
Aydin, Koray [1 ]
Li, Zhaofeng
Sahin, Levent
Ozbay, Ekmel
机构：
[1] Bilkent Univ, Nanotechnol Res Ctr, Dept Phys, TR-06800 Ankara, Turkey
[2] Bilkent Univ, Dept Elect & Elect Engn, TR-06800 Ankara, Turkey
来源：
OPTICS EXPRESS | 2008年 / 16卷 / 12期
关键词：
D O I：
10.1364/OE.16.008835
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We demonstrate a polarization independent negative-index metamaterial (NIM) at microwave frequencies. Transmission measurements and simulations predict a left-handed transmission band with negative permittivity and negative permeability. A negative-index is verified by using the retrieval procedure. Effective parameters of single-layer and two-layer NIMs are shown to be different. Negative phase advance is verified within the negative-index regime by measuring the phase shift between different sized negative-index metamaterials. Backward wave propagation is observed in the numerical simulations at frequencies where the phase advance is negative. (c) 2008 Optical Society of America.
引用
收藏
页码：8835 / 8844
页数：10
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