Sign of the refractive index in lossy metamaterials

被引：10
|
作者：
Yannopapas, Vassilios [1 ]
机构：
[1] Univ Patras, Dept Mat Sci, GR-26504 Patras, Greece
来源：
OPTICS COMMUNICATIONS | 2009年 / 282卷 / 20期
关键词：
Metamaterials; Negative refractive index; Plasmonics; Multiple-scattering; PHOTONIC CRYSTALS; NEGATIVE REFRACTION; OPTICAL-PROPERTIES; VERIFICATION; TRANSMISSION; PROPAGATION; FIELD;
D O I：
10.1016/j.optcom.2009.07.027
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
One of the criteria for determining the existence of negative index of refraction in artificial electromagnetic structures (metamaterials) is the occurrence of opposite directions of the group and phase velocities. In this work, we study specific examples of metamaterials where we show that the above criterion does not hold when losses are taken into account and dominate the interaction of light with the metamaterial. The structure are three-dimensional superlattices of consisting of plasmonic and polaritonic particles and are studied by a rigorous multiple-scattering theory and effective-medium approximation. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：4152 / 4156
页数：5
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