Terahertz Parallel-Plate Ladder Waveguide With Highly Confined Guided Modes

Author

Ahmadi-Boroujeni, M. ; Altmann, Kristian ; Scherger, B. ; Jansen, C. ; Shahabadi, Mahmoud ; Koch, Martin

Author_Institution

Sch. of Electr. & Comput. Eng., Univ. of Tehran, Tehran, Iran

Volume

3

Issue

1

fYear

2013

fDate

Jan. 2013

Firstpage

87

Lastpage

95

Abstract

In this paper, we introduce a parallel-plate ladder waveguide (PPLWG) for THz waves. The characteristics of the guided modes of this structure which belong to the category of spoof surface plasmons are studied using the generalized multipole technique and its potential applications are discussed. Moreover, the proposed structure is experimentally investigated in a THz time-domain spectroscopy system and a comparison between the calculated and measured amplitude and phase characteristics is given. It is shown that the dominant mode of the PPLWG can be excited by an incident focused beam and a high degree of field confinement in the THz regime can be achieved.

Keywords

ladder networks; parallel plate waveguides; surface plasmons; PPLWG; THz time-domain spectroscopy system; THz wave; amplitude; field confinement; focused beam; generalized multipole technique; highly confined guided mode; phase characteristics; spoof surface plasmon; terahertz parallel-plate ladder waveguide; Arrays; Attenuation; Bandwidth; Metals; Periodic structures; Plasmons; Surface waves; Modal analysis; parallel-plate waveguides (PPWGs); periodic structures; plasmonics; terahertz (THz) components;

fLanguage

English

Journal_Title

Terahertz Science and Technology, IEEE Transactions on

Publisher

ieee

ISSN

2156-342X

Type

jour

DOI

10.1109/TTHZ.2012.2228738

Filename

6400275