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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 24 — Nov. 22, 2010
  • pp: 24510–24515

Giant angular dispersion mediated by plasmonic modal competition

Chao-Yi Tai, Wen-Hsiang Yu, and Sheng Hsiung Chang  »View Author Affiliations

Optics Express, Vol. 18, Issue 24, pp. 24510-24515 (2010)

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We report on the modal competition mediated angular dispersion by heterogeneously coupled plasmonic waveguides. By varying the wavelength of the excitation, the surface waves propagate alongside the upper and lower interfaces can be manipulated in coupled, decoupled, and cutoff regimes. Depending on the coupling states, the output beam can be steered between +15° and −17° for wavelength from λ = 695nm to λ = 675nm. The maximum achieved angular dispersion can be as large as 2.1°/nm. This finding may revolutionize current design concept of spectrometers, providing a significant way to scale down the form factor further into nano-size.

© 2010 OSA

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(250.5403) Optoelectronics : Plasmonics

ToC Category:
Optics at Surfaces

Original Manuscript: September 20, 2010
Revised Manuscript: October 29, 2010
Manuscript Accepted: November 1, 2010
Published: November 9, 2010

Chao-Yi Tai, Wen-Hsiang Yu, and Sheng Hsiung Chang, "Giant angular dispersion mediated by plasmonic modal competition," Opt. Express 18, 24510-24515 (2010)

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