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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 2 — Jan. 18, 2010
  • pp: 1289–1295

Improvement of THz coupling using a tapered parallel-plate waveguide

Sang-Hoon Kim, Eui Su Lee, Young Bin Ji, and Tae-In Jeon  »View Author Affiliations


Optics Express, Vol. 18, Issue 2, pp. 1289-1295 (2010)
http://dx.doi.org/10.1364/OE.18.001289


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Abstract

This paper reports an experimental and simulation study of a tapered parallel-plate waveguide (TPPWG) to improve THz coupling to the plate separation gap. The flat- and round-type TPPWG without any silicon lens is compared to the parallel-plate waveguide (PPWG) with a plano-cylindrical silicon lens. The spectrum amplitudes of the input-side TPPWG and the input- and output-side TPPWG both having a 3° slop angle increased about 56% and 103% at 1 THz when compared to that of the PPWG. Since the input- and output-side TPPWG had almost no impedance mismatch to the propagating THz wave, coupling to the waveguide could be improved twice compared with the PPWG.

© 2010 OSA

OCIS Codes
(130.2790) Integrated optics : Guided waves
(230.7370) Optical devices : Waveguides
(350.5500) Other areas of optics : Propagation
(040.2235) Detectors : Far infrared or terahertz

ToC Category:
Integrated Optics

History
Original Manuscript: December 10, 2009
Revised Manuscript: December 31, 2009
Manuscript Accepted: January 4, 2010
Published: January 11, 2010

Citation
Sang-Hoon Kim, Eui Su Lee, Young Bin Ji, and Tae-In Jeon, "Improvement of THz coupling using a tapered parallel-plate waveguide," Opt. Express 18, 1289-1295 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-2-1289


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