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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. 28, Iss. 1 — Jan. 1, 2011
  • pp: 109–114

Surface-induced nonlinearity enhancement of TM modes in planar subwavelength waveguides

D. V. Skryabin, A. V. Gorbach, and A. Marini  »View Author Affiliations


JOSA B, Vol. 28, Issue 1, pp. 109-114 (2011)
http://dx.doi.org/10.1364/JOSAB.28.000109


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Abstract

Using an asymptotic expansion of Maxwell equations and boundary conditions, we derive an amplitude equation for nonlinear TM modes in planar metal and dielectric waveguides. Our approach reveals that the physics of the significant enhancement of the nonlinear response in subwavelength waveguides with respect to their weakly guiding counterparts is hidden in surface effects. The corresponding enhancement factor is determined by the products of the surface discontinuities of the transverse field components and of the surface values of the longitudinal components of the electric field summed over all the interfaces. We present an insightful expression for the enhancement factor induced by the surface plasmon polaritons and discuss numerical and analytical results for the subwavelength dielectric and metal slot waveguides. Our theory also includes diffraction effects along the unbound direction in these waveguides.

© 2011 Optical Society of America

OCIS Codes
(130.2790) Integrated optics : Guided waves
(130.4310) Integrated optics : Nonlinear
(190.4350) Nonlinear optics : Nonlinear optics at surfaces
(190.4390) Nonlinear optics : Nonlinear optics, integrated optics
(240.4350) Optics at surfaces : Nonlinear optics at surfaces
(240.6680) Optics at surfaces : Surface plasmons

ToC Category:
Nonlinear Optics

History
Original Manuscript: August 20, 2010
Manuscript Accepted: October 31, 2010
Published: December 17, 2010

Citation
D. V. Skryabin, A. V. Gorbach, and A. Marini, "Surface-induced nonlinearity enhancement of TM modes in planar subwavelength waveguides," J. Opt. Soc. Am. B 28, 109-114 (2011)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-28-1-109

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