S-Polarized Surface waves in Ferrite bounded by Nonlinear Nonmagnetic Negative Permittivity Metamaterial

In this paper, we studied the S-polarized (TE) nonlinear Magnetostatic surface wave in ferrite bounded by nonlinear nonmagnetic negative permittivity metamaterial. A ferrite layer (YIG) is sandwiched between two thick nonlinear nonmagnetic negative permittivity material layers (NPM). The dispersion relation for TE nonlinear Magnetostatic surface waves (NMSSW) has been derived for the proposed structure and numerically investigated. We found that effective refractive index decreases with thickness and frequency increase. Also, the effective refractive index increases with optical nonlinearity increase and flips to negative values at a certain value of optical nonlinearity. Thus, the structure behaves like a left-handed-material. We found that the power flow is changing by changing the operating frequency, the ferrite thickness, and the optical nonlinearity.

Keywords:Magnetostatic surface waves MSW; dispersion relation; negative permittivity material NPM; power flow.