Title :
Metal disc-type splitter with radially placed gratings for terahertz surface waves
Author :
Shibayama, J. ; Yamauchi, J. ; Nakano, H.
Author_Institution :
Fac. of Sci. & Eng., Hosei Univ., Koganei, Japan
Abstract :
A novel way to split terahertz (THz) surface waves is presented on the basis of propagation characteristics of spoof surface plasmon polaritons. Metal disc-type splitters with a centre hole and radially placed gratings are proposed and analysed using the finite-difference time-domain (FDTD) method in cylindrical co-ordinates. Numerical results demonstrate that the discs act as bi- and multi-directional THz surface wave splitters with large coupling regions, the frequency of which is selected by grating structures.
Keywords :
diffraction gratings; finite difference time-domain analysis; microwave photonics; optical beam splitters; polaritons; surface plasmons; terahertz waves; FDTD; bidirectional THz surface wave splitters; finite-difference time-domain method; grating structures; metal disc-type splitter; multidirectional THz surface wave splitters; propagation characteristics; radially placed gratings; surface plasmon polaritons; terahertz surface waves;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2014.4331
