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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 26 — Dec. 24, 2007
  • pp: 18050–18055

Bidirectional subwavelength slit splitter for THz surface plasmons

Qiaoqiang Gan, Zhan Fu, Yujie J. Ding, and Filbert J. Bartoli  »View Author Affiliations


Optics Express, Vol. 15, Issue 26, pp. 18050-18055 (2007)
http://dx.doi.org/10.1364/OE.15.018050


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Abstract

We have conducted a feasibility study of a frequency splitter operating at THz frequencies, based on a bidirectional subwavelength slit simulated using two-dimensional finite difference time domain (FDTD) techniques. The near-field wave emanating from the narrow slit serves as a subwavelength-scaled excitation source. By placing two optimized grating structures on the opposite sides of the slit, the THz waves at different frequencies are guided in the two desired directions. Confinement of the optical field is illustrated for different surface structures.

© 2007 Optical Society of America

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(260.2110) Physical optics : Electromagnetic optics
(260.3910) Physical optics : Metal optics
(310.2790) Thin films : Guided waves

ToC Category:
Optics at Surfaces

History
Original Manuscript: October 25, 2007
Revised Manuscript: December 13, 2007
Manuscript Accepted: December 16, 2007
Published: December 18, 2007

Citation
Qiaoqiang Gan, Zhan Fu, Yujie J. Ding, and Filbert J. Bartoli, "Bidirectional subwavelength slit splitter for THz surface plasmons," Opt. Express 15, 18050-18055 (2007)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-15-26-18050


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