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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 14, Iss. 1 — Jan. 9, 2006
  • pp: 279–290

Enhanced coupling of terahertz radiation to cylindrical wire waveguides

Jason A. Deibel, Kanglin Wang, Matthew D. Escarra, and Daniel M. Mittleman  »View Author Affiliations

Optics Express, Vol. 14, Issue 1, pp. 279-290 (2006)

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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.

© 2006 Optical Society of America

OCIS Codes
(230.7370) Optical devices : Waveguides
(240.6690) Optics at surfaces : Surface waves
(260.3090) Physical optics : Infrared, far
(320.7160) Ultrafast optics : Ultrafast technology

ToC Category:
Optical Devices

Jason A. Deibel, Kanglin Wang, Matthew D. Escarra, and Daniel Mittleman, "Enhanced coupling of terahertz radiation to cylindrical wire waveguides," Opt. Express 14, 279-290 (2006)

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