Superluminal group velocity in an anisotropic metamaterial

被引：23

作者：

Luo, HL ^{[1
]}

Hu, W

Shu, WX

Li, F

Ren, ZZ

机构：

[1] Nanjing Univ, Dept Phys, Nanjing 210008, Peoples R China

[2] S China Normal Univ, Lab Light Transmiss Opt, Guangzhou 510630, Guangdong, Peoples R China

来源：

EUROPHYSICS LETTERS | 2006年 / 74卷 / 06期

关键词：

D O I：

10.1209/epl/i2006-10046-4

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Based on boundary condition and dispersion relation, the superluminal group velocity in an anisotropic metamaterial (AMM) is investigated. The superluminal propagation is induced by the hyperbolic dispersion relation associated with the AMM. It is shown that a modulated Gaussian beam exhibits a superluminal group velocity which depends on the choice of incident angles and optical axis angles. The superluminal propagation does not violate the theory of special relativity because the group velocity is the velocity of the peak of the localized wave packet which does not carry information. It is proposed that a triglycine sulfate (TGS) crystal can be designed and the superluminal group velocity can be measured experimentally.

引用

页码：1081 / 1087

页数：7

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