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Opt Express. 2009 May 25;17(11):9282-7.

Nonlinearity of optimized silicon photonic slot waveguides.

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  • 1Austrian Research Centers GmbH - ARC, Nano-System-Technologies Donau-City-Str. 1, 1220 Vienna, Austria.


In this numerical study, we show that by exploiting the advantages of the horizontal silicon slot wave-guide structure the nonlinear interaction can be significantly increased compared to vertical slot waveguides. The deposition of a 20 nm thin optically nonlinear layer with low refractive index sandwiched between two silicon wires of 220 nm width and 205 nm height could enable a nonlinearity coefficient gamma of more than 2 x 10(7) W(-1)km(-1).

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