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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry van Driel
  • Vol. 27, Iss. 11 — Nov. 1, 2010
  • pp: 2433–2437

Transmission enhancement of slow light by a subwavelength plasmon-dielectric system

Bin Tang, Lei Dai, and Chun Jiang  »View Author Affiliations


JOSA B, Vol. 27, Issue 11, pp. 2433-2437 (2010)
http://dx.doi.org/10.1364/JOSAB.27.002433


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Abstract

We present a theoretical and numerical analysis of a subwavelength plasmon-dielectric system that incorporates a periodic metal grating deposited on a dielectric waveguide and supports transmission enhancement of slow light at infrared wavelength for the s polarization. We find that a Fano resonance mechanism to produce this novel phenomenon is based on the interaction of the discrete waveguide-plasmon hybridization modes with the incident photon continuum, which is different from the popular cases with surface plasmonic modes excited by p polarized incident light. The further analysis of the Fano effect indicates that group velocity of slow light and transparent efficiency can be controlled in a large range by the coupling strength, and a more than 20-fold transmission enhancement corresponding to the group velocity of 0.005 c is obtained as compared to the case without the dielectric waveguide substrate.

© 2010 Optical Society of America

OCIS Codes
(050.0050) Diffraction and gratings : Diffraction and gratings
(230.7370) Optical devices : Waveguides
(240.6680) Optics at surfaces : Surface plasmons

ToC Category:
Optics at Surfaces

History
Original Manuscript: August 4, 2010
Manuscript Accepted: September 18, 2010
Published: October 27, 2010

Citation
Bin Tang, Lei Dai, and Chun Jiang, "Transmission enhancement of slow light by a subwavelength plasmon-dielectric system," J. Opt. Soc. Am. B 27, 2433-2437 (2010)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-27-11-2433

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