Open AccessTerahertz surface wave propagation and focusing on conical metal wires
Author(s) -
Huawei Liang,
Shuangchen Ruan,
Min Zhang
Publication year - 2008
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.16.018241
Subject(s) - conical surface , terahertz radiation , optics , surface wave , materials science , wave propagation , surface (topology) , metamaterial , terahertz spectroscopy and technology , physics , geometry , mathematics , composite material
A theory for treating terahertz (THz) surface wave propagation and focusing on conical metal wire waveguides is presented. According to the theory, the surface wave propagation and focusing on the conical copper wire waveguide is investigated by the numerical calculation, and the results show the theory agrees with experimental measurement result obtained by Ji et al. The theory presented provides a basis for describing surface wave propagation and focusing on conical metal wire waveguides and, importantly, the theory suggests that a simple conical metal wire can be used for subwavelength energy concentration and superfocusing.