Enhanced Coupling of Terahertz Radiation to Cylindrical Wire Waveguides
Document Type
Article
Publication Date
1-9-2006
Abstract
Wire waveguides have recently been shown to be valuable for transporting pulsed terahertz radiation. This technique relies on the use of a scattering mechanism for input coupling. A radially polarized surface wave is excited when a linearly polarized terahertz pulse is focused on the gap between the wire waveguide and another metal structure. We calculate the input coupling efficiency using a simulation based on the Finite Element Method (FEM) Additional FEM results indicate that enhanced coupling efficiency can be achieved through the use of a radially symmetric photoconductive antenna. Experimental results confirm that such an antenna can generate terahertz radiation which couples to the radial waveguide mode with greatly improved efficiency.
Repository Citation
Deibel, J. A.,
Wang, K.,
Escarra, M.,
& Mittleman, D. M.
(2006). Enhanced Coupling of Terahertz Radiation to Cylindrical Wire Waveguides. Optics Express, 14 (1), 279-290.
https://corescholar.libraries.wright.edu/physics/852
DOI
10.1364/OPEX.14.000279
