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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. 29, Iss. 5 — May. 1, 2012
  • pp: 950–958

Guided plasmon modes of triangular and inverted triangular cross-section silver nanoridges

Zeyu Pan, Junpeng Guo, Richard Soref, Walter Buchwald, and Greg Sun  »View Author Affiliations


JOSA B, Vol. 29, Issue 5, pp. 950-958 (2012)
http://dx.doi.org/10.1364/JOSAB.29.000950


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Abstract

Propagating plasmon modes guided along silver metal nanoridges with triangular and inverted triangular cross sections are investigated in this paper. Mode field profiles, dispersion curves, propagation distances, and figure-of-merits of the plasmon modes are calculated for silver nanoridges with various triangular and inverted triangular waveguide cross sections. It is found that the triangular cross-section nanoridge waveguide, if designed properly, can have longer propagation distance and higher figure-of-merit than the flat-top nanoridge waveguide of the same width. When the triangle height of the nanoridge is high, the mode approaches the small angle wedge mode. An inverted triangular cross-section nanoridge mode can be considered as a hybrid mode of two metal wedge plasmon modes. When inverted triangle depth increases, the propagation distance and the figure-of-merit decrease dramatically, suggesting poorer performance when compared to the flat-top nanoridge plasmon waveguide.

© 2012 Optical Society of America

OCIS Codes
(230.7370) Optical devices : Waveguides
(240.6680) Optics at surfaces : Surface plasmons

ToC Category:
Optics at Surfaces

History
Original Manuscript: January 5, 2012
Revised Manuscript: February 1, 2012
Manuscript Accepted: February 6, 2012
Published: April 11, 2012

Citation
Zeyu Pan, Junpeng Guo, Richard Soref, Walter Buchwald, and Greg Sun, "Guided plasmon modes of triangular and inverted triangular cross-section silver nanoridges," J. Opt. Soc. Am. B 29, 950-958 (2012)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-29-5-950


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