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We develop a perturbative theory to describe optical propagation in subwavelength rod waveguides. In this approach, we account for loss and nonlinearity in the boundary conditions. A comparison to the traditional perturbative approach used in optical fibers reveals that the surface contribution provides a significant nonlinearity enhancement in the subwavelength regime. We further compare the nonlinearity enhancement of metallic, dielectric, and semiconductor waveguides, in addition to determining the attenuation coefficient of metallic nanowires.
|Journal||Physical Review A: Atomic, Molecular, and Optical Physics|
|Publication status||Published - 19 Dec 2011|
Marini, A., Hartley, R., Gorbach, A. V., & Skryabin, D. V. (2011). Surface-induced nonlinearity enhancement in subwavelength rod waveguides. Physical Review A: Atomic, Molecular, and Optical Physics, 84(6), . https://doi.org/10.1103/PhysRevA.84.063839