FDTD STUDY ON WAVE PROPAGATION IN LAYERED STRUCTURES WITH BIAXIAL ANISOTROPIC METAMATERIALS

—The Gaussian beam,propagation in multi-layered struc- tures that include indefinite anisotropic metamaterial (AMM) are sim- ulated with shift operator method,in Finite-Difference Time-Domain method,(FDTD). The excitations of backward and forward surface affected by the types of biaxial AMM are investigated. Numerical results show that the directions of the guided wave excited are influ- enced by the sign of z component,of relative permeability tensor of AMM that determines the energy flow is positively refracted or neg- atively refracted. Positive or negative Goos-H¨ anchen shift associated with Total Cutoff media are also shown.