Open AccessEnhancement of the detection of THz Sommerfeld wave using a conical wire waveguide
Author(s) -
Young Bin Ji,
Eui Su Lee,
Jin Seok Jang,
Tae-In Jeon
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.16.000271
Subject(s) - terahertz radiation , conical surface , optics , materials science , hfss , waveguide , optoelectronics , physics , antenna (radio) , telecommunications , microstrip antenna , computer science , composite material
In this study, the coupling properties of a conical copper wire waveguide were investigated in the terahertz (THz) frequency range using theoretical simulations and experiments. Because a conical wire tip has a smaller tip diameter than a cylindrical wire tip, it has a greater THz field density than a cylindrical wire tip. The measured THz pulse increased 4.5 times upon contact with the 30 microm-diameter conical wire tip compared with the THz pulse when a 500 microm-diameter cylindrical wire tip was used. This result agrees well with that of theoretical simulations such as high-frequency structure simulation (HFSS), which is based on the finite element method.