Abstract

A proposal for broadband wavelength conversion using four-wave mixing is presented based on a slot waveguide with silicon nanocrystals (Si-nc’s) as the optical nonlinear material. The dispersion of the waveguide is engineered to realize a flat dispersion as well as a small effective mode area for better nonlinear interaction by optimizing the waveguide dimensions. The conversion performance is synthetically analyzed and numerical results show that a bandwidth of over 400nm and an efficiency of 2.38dB can be achieved using a pump power of 150mW in a 4mm long Si-nc slot waveguide with slot width of 50nm, slab width of 310nm, and height of 305nm.

© 2011 Optical Society of America

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