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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 35, Iss. 24 — Dec. 15, 2010
  • pp: 4181–4183

Bidirectional surface wave splitter at visible frequencies

Qiaoqiang Gan and Filbert J. Bartoli  »View Author Affiliations

Optics Letters, Vol. 35, Issue 24, pp. 4181-4183 (2010)

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We experimentally demonstrate a metal–film bidirectional surface wave splitter for guiding light at two visible wavelengths in opposite directions. Two nanoscale gratings were patterned on opposite sides of a subwavelength slit. The metallic surface grating structures were tailored geometrically to have different plasmonic bandgaps, enabling each grating to guide light of one wavelength and prohibit propagation at the other wavelength. The locations of the bandgaps were experimentally confirmed by interferometric measurements. Based on these design principles, a green–red bidirectional surface wave splitter is demonstrated, and the observed optical properties are shown to agree with theoretical predictions.

© 2010 Optical Society of America

OCIS Codes
(050.2770) Diffraction and gratings : Gratings
(230.7370) Optical devices : Waveguides
(240.6680) Optics at surfaces : Surface plasmons
(260.3910) Physical optics : Metal optics

ToC Category:
Optics at Surfaces

Original Manuscript: August 23, 2010
Revised Manuscript: November 17, 2010
Manuscript Accepted: November 19, 2010
Published: December 13, 2010

Qiaoqiang Gan and Filbert J. Bartoli, "Bidirectional surface wave splitter at visible frequencies," Opt. Lett. 35, 4181-4183 (2010)

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