Quasi-TEM mode propagation in twin-wire THz waveguides

被引：0
|
作者：
P.Tannouri [1 ]
M.Peccianti [1 ,2 ]
P.L.Lavertu [1 ]
F.Vida [1 ]
R.Morandotti [1 ]
机构：
[1] INRS-EMT,1650 Boulevard Lionel-Boulet,Varennes,J3X 1S2 Canada
[2] IPCF-CNR,UOS Roma,Sapienza University,P.A.Moro 2,00185 Rome,Italy
来源：
ChineseOpticsLetters | 2011年 / 9卷 / 11期
基金：
加拿大自然科学与工程研究理事会;
关键词：
THz; mode; Quasi-TEM mode propagation in twin-wire THz waveguides; TEM;
D O I：
暂无
中图分类号：
TN011 [电波传播、传播机理];
学科分类号：
080904 ;
摘要：
We numerically investigate the trade-offs between the dispersion properties,coupling efficiency,and geometrical constraints in dual-wire (twin-lead) terahertz (THz) waveguides.In particular,we show that their inherent linearly polarized quasi-transverse electromagnetic (TEM) modes exist for waveguide transverse dimensions comparable with the wavelength,enabling significant end-fire coupling (>10%) for numericalaperture limited Gaussian beams while supporting a relatively low-dispersion propagation of below 0.5 ps 2 /m,as desired for short-pulse time-domain spectroscopy applications.Starting from the dual-wire structure,we also demonstrate that low-dispersion tapers can be designed to improve coupling efficiency.
引用
收藏
页码：62 / 65
页数：4
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