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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 13, Iss. 2 — Jan. 24, 2005
  • pp: 511–518

Azimuthally polarized surface plasmons as effective terahertz waveguides

Qing Cao and Jürgen Jahns  »View Author Affiliations

Optics Express, Vol. 13, Issue 2, pp. 511-518 (2005)

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Quite recently, it was found that metal wires can effectively guide terahertz radiation. Based on the fact that the absolute values of the relative permittivities of metals in the spectral region of terahertz radiation are huge, we here analyse the properties of this kind of waveguide and explain the related experimental results. In particular, we show that the observed waveguiding is due to the propagation of an azimuthally polarized surface plasmon along the wire. Some related aspects, such as the choice of metal and the slowly decaying modal field, are also discussed. In particular, we show that, if a copper wire with a radius of 0.45 mm is used, the attenuation coefficient is smaller than 2×10-3 cm-1 in the whole range of 0.1~1 THz.

© 2005 Optical Society of America

OCIS Codes
(230.7370) Optical devices : Waveguides
(240.6680) Optics at surfaces : Surface plasmons
(260.3090) Physical optics : Infrared, far
(260.3910) Physical optics : Metal optics

ToC Category:
Research Papers

Original Manuscript: December 15, 2004
Revised Manuscript: January 12, 2005
Published: January 24, 2005

Qing Cao and Jürgen Jahns, "Azimuthally polarized surface plasmons as effective terahertz waveguides," Opt. Express 13, 511-518 (2005)

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Fig. 1. Fig. 2. Fig. 3.

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