FDTD Modelling of Lorentzian DNG metamaterials using Approximate-Decoupling Method Based on the Unconditionally-Stable Crank–Nicolson Scheme
نویسندگان
چکیده
An implicit finite-difference time-domain (FDTD) method using the approximate decoupling method based on the unconditionally-stable Crank-Nicolson scheme has been used to study a special class of artificially engineered materials having negative permittivity and permeability, called metamaterials. The 2-d propagation of the EM waves has been analyzed. The Convolution Perfectly Matched Layer (CPML) boundary condition has been used to truncate the computational space. Within the CN-FDTD formulation, the auxiliary differential equation (ADE) method has been used for treating the Lorentz media by making use of auxiliary variables. The process is easy, reliable and also causal in nature thus making it proficient. It uses fair approximations to explicate the model. The properties of metamaterial conform to their speculations of negative refractive index and energy absorption and enhancement property with the aid of graphs engineered by matlab simulation. The results achieved elucidate the validity and effectiveness of this method in designing (DNG) metamaterials.
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