Abstract
With the use of perturbation theory the zero- and higher-order approximations are obtained for characteristic matrices, reflection and transmission operators, scalar reflectance and transmittance of monochromatic electromagnetic waves impinging on a transparent weakly inhomogeneous stratified bianisotropic medium. The proposed procedure of perturbation series formation enables finding the corrections to the reflection and transmission factors in closed form for specified coordinate dependencies for the material tensors of the bianisotropic layers. The general expressions obtained are applied to calculate the first-order corrections for normal incident light on (i) a twisted uniaxial slab, (ii) an isotropic medium with arbitrary inhomogeneity profile and (iii) a one-dimensional photonic crystal with arbitrary number of layers. Exact and approximate solutions of the wave equations are numerically compared.
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