Metal-clad multilayer waveguide: Circle-chain convergent method and two perturbation methods

Computer modeling studies for the calculation of the propagation constants and attenuation coefficients of TE mode in an asymmetric metal/dielectric/d ielectric layers structure are presented. Two different perturbation method s, circle chain convergent method and Downhill method are used. The last tw o methods can be used easily for the waveguides consist of any number of la yers with complex refractive index due to gain and loss. The developed prog rams were run on a personal computer and numerical results are presented.