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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 9 — May. 6, 2013
  • pp: 10642–10650

Efficient coupling of propagating broadband terahertz radial beams to metal wires

Zhu Zheng, Natsuki Kanda, Kuniaki Konishi, and Makoto Kuwata-Gonokami  »View Author Affiliations

Optics Express, Vol. 21, Issue 9, pp. 10642-10650 (2013)

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Bare metal wires have recently been demonstrated as waveguides for transporting terahertz (THz) radiation, where the guiding mode is radially polarized surface Sommerfeld waves. In this study, we demonstrate high-efficiency coupling of a broadband radially polarized THz pulsed beam, which is generated with a polarization-controlled beam by a segmented half-wave-plate mode converter, to bare copper wires. A total coupling efficiency up to 16.8% is observed, and at 0.3 THz, the maximum coupling efficiency is 66.3%. The results of mode-overlap calculation and numerical simulation support the experimental data well.

© 2013 OSA

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:
Optics at Surfaces

Original Manuscript: February 25, 2013
Revised Manuscript: April 18, 2013
Manuscript Accepted: April 18, 2013
Published: April 24, 2013

Zhu Zheng, Natsuki Kanda, Kuniaki Konishi, and Makoto Kuwata-Gonokami, "Efficient coupling of propagating broadband terahertz radial beams to metal wires," Opt. Express 21, 10642-10650 (2013)

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