Skryabin, D. V., Gorbach, A. V. and Marini, A., 2011. Surface-induced nonlinearity enhancement of TM modes in planar subwavelength waveguides. Journal of the Optical Society of America B-Optical Physics, 28 (1), pp. 109-114.
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.
|Item Type ||Articles|
|Creators||Skryabin, D. V., Gorbach, A. V. and Marini, A.|
|Departments||Faculty of Science > Physics|
|Research Centres||Centre for Photonics and Photonic Materials|
|Publisher Statement||Skryabin_JosaB_2011)28_1_109.pdf: © 2011 The Optical Society. This paper was published in Journal of the Optical Society of America B-Optical Physics and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://dx.doi.org/10.1364/JOSAB.28.000109. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.|
Actions (login required)