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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 4 — Feb. 18, 2008
  • pp: 2676–2684

Optics InfoBase > Optics Express > Volume 16 > Issue 4 > Page 2676

Scaling for gap plasmon based waveguides

Sergey I. Bozhevolnyi and Jesper Jung  »View Author Affiliations


Optics Express, Vol. 16, Issue 4, pp. 2676-2684 (2008)
http://dx.doi.org/10.1364/OE.16.002676


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Abstract

Using the effective-index approach and an explicit expression for the propagation constant of gap surface plasmon polaritons (G-SPPs) obtained for moderate gap widths, we introduce a normalized waveguide parameter characterizing the mode field confinement and obtain the corresponding expressions for various (gap, trench and V-groove) G-SPP based waveguides. Usage of the obtained relations is investigated with a finite-element method, demonstrating that waveguides with different dimensions and operating at different wavelengths, but having the same normalized parameter, exhibit very similar field confinement. These relations allow one to design G-SPP waveguides for single-mode operation supporting a well-confined fundamental mode.

© 2008 Optical Society of America

OCIS Codes
(230.7380) Optical devices : Waveguides, channeled
(240.6680) Optics at surfaces : Surface plasmons
(250.5300) Optoelectronics : Photonic integrated circuits

ToC Category:
Optics at Surfaces

History
Original Manuscript: December 11, 2007
Revised Manuscript: February 7, 2008
Manuscript Accepted: February 7, 2008
Published: February 12, 2008

Citation
Sergey I. Bozhevolnyi and Jesper Jung, "Scaling for gap plasmon based waveguides," Opt. Express 16, 2676-2684 (2008)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-16-4-2676


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