A Plasmonic Optical Waveguide Based on the Kerr Nonlinearity of Ag/SiO۲ Medium for DWDM Telecommunication Applications

Optical devices are an undeniable part of the next generation of information technology. One of the main optical devices required in all structures and systems is an optical waveguide, which is responsible for directing light in desired paths within the circuits of the optical complex. In this research, an optical waveguide is designed consisting of an array Ag rods with the radius (r) of ۱ μm as plasmonic element surrounded by SiO۲ as dielectric medium. Excitation of the surface plasmon polariton at the interface of Ag/SiO۲ enhances the electrical field in the vicinity of Ag rods resulting in a Kerr-type nonlinearity in the refractive index of medium. This nonlinearity confines the incident light and establish an optical forbidden gap at the wavelength range of ۱۴۵۰~۱۵۶۰ nm suitable for DWDM communication systems. The wavelength range of the optical forbidden gap can be manipulated by adjusting the power of the incident light and changing the plasmoin element.

کلیدواژه ها:

Optical devices ، Optical waveguide ، Plasmonic ، Kerr nonlinearity ، DWDM ، Telecommunication