Surface plasmon-assisted optical switching/bistability at telecommunication wavelengths in nonlinear dielectric gratings
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Date
2015
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Abstract
In this paper, we numerically investigate nonlinear optical responses in dielectric gratings coated by flat
metallic surface, where the structural parameters are chosen for wavelengths of operation at the telecom
regime. The presented designs show the output light reflection with respect to the incident intensity of
increasing, decreasing, and non-monotonic belt-shape functions. Nonlinear optical responses including
switching and bistability appeared in the telecom region owing to assistance of surface plasmon resonance
excited at the metal/dielectric interface, which enhances the diffraction efficiency and induces the
momentum matching for the leaky modes of the dielectric grating. This results in electric intensityeffective
refractive index dependence enhancement in the Kerr nonlinear media. Our design and
investigation of the linear and nonlinear optical responses will provide a general guideline for a hybrid
metallic-dielectric structure-based optical switching/bistability device design.
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Keywords
Gratings Surface plasmon; Kerr effect; Integrated optics