Refraction in media with a negative refractive index

被引:356
作者
Foteinopoulou, S
Economou, EN
Soukoulis, CM [1 ]
机构
[1] US DOE, Ames Lab, Ames, IA 50011 USA
[2] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA
[3] FORTH, Res Ctr Crete, Iraklion, Crete, Greece
关键词
D O I
10.1103/PhysRevLett.90.107402
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We show that an electromagnetic (EM) wave undergoes negative refraction at the interface between a positive and negative refractive index material, the latter being a properly chosen photonic crystal. Finite-difference time-domain (FDTD) simulations are used to study the time evolution of an EM wave as it hits the interface. The wave is trapped temporarily at the interface, reorganizes, and, after a long time, the wave front moves eventually in the negative direction. This particular example shows how causality and speed of light are not violated in spite of the negative refraction always present in a negative index material.
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页数:4
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