Title

Mode Matching of Terahertz Radiation to Cylindrical Wire Waveguides using Radially Symmetric Photoconductive Antennas

Document Type

Conference Proceeding

Publication Date

7-2006

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Abstract

Wire waveguides have recently been shown to be valuable for transporting pulsed terahertz radiation. 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.

Comments

Presented at the IEEE Antennas and Propagation Society International Symposium, Albuquerque, NM, July 9-14, 2006.

DOI

10.1109/APS.2006.1711079

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