Superluminal terahertz pulses

被引：61

作者：

Wynne, K ^{[1
]}

Jaroszynski, DA ^{[1
]}

机构：

[1] Univ Strathclyde, Dept Phys & Appl Phys, Femtosecond Res Ctr, Glasgow G4 0NG, Lanark, Scotland

来源：

OPTICS LETTERS | 1999年 / 24卷 / 01期

关键词：

D O I：

10.1364/OL.24.000025

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In femtosecond terahertz-pulse (T-ray) imaging of metal structures with dimensions of the order of the wavelength, it is observed that the T rays propagate faster than the vacuum speed of light. In the case of apertures this can be understood as a waveguide effect in which superluminal velocities are expected close to the cutoff frequency. However, the effect is also observed close to knife edges and in propagation past thin metal wires. (C) 1999 Optical Society of America.

引用

页码：25 / 27

页数：3

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