Characterization of dispersion properties of silicon nanowire considering different core geometry

Silicon nanowires on silica cladding have been simulated using finite element method in this paper. The transverse and longitudinal electric field patterns are analyzed and it has been observed that a smaller core dimension results in a larger longitudinal field. Also, dispersion engineering through configuring the nanowire structure has been discussed. It is found that a smaller core dimension would result in a larger dispersion. Method of achieving zero dispersion in either infrared or optical communication region has also been suggested.