An unconditionally stable FDTD method for electromagnetic wave propagation analysis in bi-isotropic media

An unconditionally stable finite-difference time-domain (FDTD) scheme, which employs a similar technique to the alternating direction implicit (ADI), is proposed to study the electromagnetic wave propagation in bi-isotropic media. In the proposed scheme, the unidimensional Maxwell´s equations in the time domain for bi-isotropic media were solved numerically. All transversal field components were included in the formalism to properly account special phenomena that may occur, such as polarization rotation and nonorthogonality between the electric and magnetic fields. The presented results are focused on chiral media.