Simultaneous negative phase and group velocity of light in a metamaterial

被引：654
|
作者：
Dolling, G
Enkrich, C
Wegener, M
Soukoulis, CM
Linden, S
机构：
[1] Univ Karlsruhe TH, Ctr Funct Nanostruct, Inst Angew Phys & Deutsch Forschungsgemeinschaft, D-76131 Karlsruhe, Germany
[2] Forschungszentrum KarlsruheHelmholtz Gemeinschaft, Inst Nanotechnol, D-76021 Karlsruhe, Germany
[3] Iowa State Univ, Ames Lab, Ames, IA 50011 USA
[4] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA
[5] Univ Crete, Dept Mat Sci & Technol, Iraklion 71110, Crete, Greece
[6] Fdn Res & Technol Hellas, Inst Elect Struct, Iraklion 71110, Crete, Greece
来源：
SCIENCE | 2006年 / 312卷 / 5775期
关键词：
D O I：
10.1126/science.1126021
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
We investigated the propagation of femtosecond laser pulses through a metamaterial that has a negative index of refraction for wavelengths around 1.5 micrometers. From the interference fringes of a Michelson interferometer with and without the sample, we directly inferred the phase time delay. From the pulse-envelope shift, we determined the group time delay. In a spectral region, phase and group velocity are negative simultaneously. This means that both the carrier wave and the pulse envelope peak of the output pulse appear at the rear side of the sample before their input pulse counterparts have entered the front side of the sample.
引用
收藏
页码：892 / 894
页数：3
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