Reducing Transmission Losses in Hollow THz Waveguides

被引：84

作者：

Mitrofanov, Oleg ^{[1
]}

James, Richard ^{[1
,2
]}

Fernandez, F. Anibal ^{[1
]}

Mavrogordatos, Themistoklis K. ^{[3
]}

Harrington, James A. ^{[4
]}

机构：

[1] UCL, London WC1E 7JE, England

[2] Univ Ghent, B-9000 Ghent, Belgium

[3] Univ Cambridge, Cambridge CB2 1PZ, England

[4] Rutgers State Univ, Piscataway, NJ 08854 USA

来源：

IEEE TRANSACTIONS ON TERAHERTZ SCIENCE AND TECHNOLOGY | 2011年 / 1卷 / 01期

基金：

英国工程与自然科学研究理事会;

关键词：

Dispersion; near-field microscopy; terahertz waveguides; THz spectroscopy; transmission loss; waveguide modes; TERAHERTZ; FIBER; SURFACE; MODE; PROPAGATION; PULSES; INDEX;

D O I：

10.1109/TTHZ.2011.2159547

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Research on reducing material absorption in Terahertz (THz) waveguides has lead to development of guiding structures with transmission losses as low as 1 dB/m. Among waveguides that exhibit low loss at THz frequencies are the dielectric-lined hollow cylindrical metallic waveguides. Loss reduction in this waveguide is attributed to an ideal profile of the dominant hybrid HE mode. This mode profile also results in relatively low dispersion and very high coupling efficiency. In this contribution we overview properties of dielectric-lined hollow cylindrical metallic waveguides for THz waves, their design principles and the fabrication process. The impact of the mode profile on losses and dispersion at THz frequencies is confirmed experimentally by THz near-field imaging and THz time-domain spectroscopy and numerically by the finite element method.

引用

页码：124 / 132

页数：9

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