THz surface plasmon modes on planar Goubau lines

被引:16
作者
Gacemi, D. [1 ]
Mangeney, J. [1 ]
Laurtent, T. [1 ]
Lampin, J. -F. [2 ]
Akalin, T. [2 ]
Blary, K. [2 ]
Degiron, A. [1 ]
Crozat, P. [1 ]
Meng, F. [1 ]
机构
[1] Univ Paris 11, Inst Elect Fondamentale, CNRS, UMR8622, F-91405 Orsay, France
[2] Univ Lille 1, CNRS, Inst Elect Microelect & Nanotechnol, UMR8520, F-59652 Villeneuve Dascq, France
来源
OPTICS EXPRESS | 2012年 / 20卷 / 08期
关键词
TRANSMISSION-LINES; TERAHERTZ; WIRE;
D O I
10.1364/OE.20.008466
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
The dispersion relation and confinement of terahertz surface plasmon modes propagating along planar Goubau lines are studied using guided-wave time domain spectroscopy. We demonstrate the radial nature of the surface plasmon mode known as the Goubau mode and the transverse confinement of the electric field over a few tenths of microns (similar to 1/10). We experimentally and computationally observed a transition of the shape of the THz pulses from unipolar to bipolar as the propagation distance increases, indicating that the Goubau line acts as a high-pass filter. The deviation of the dispersion relation curve from a linear law above 600 GHz is discussed. (C) 2012 Optical Society of America
引用
收藏
页码:8466 / 8471
页数:6
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