MODAL CHARACTERISTICS OF EM WAVE-PROPAGATION THROUGH A CHIROFIBRE WITH DIFFERENT CORE AND CLADDING CHIRAL ADMITTANCES

The paper discusses EM wave propagation through a chirofibre in which the core as well as the cladding are chiral materials of different con stitutions. The general eigenvalue equation is derived and solved nume rically for the lowest polar variation index v ( = 0). It is observed that with increasing chiral admittance in the core the number of propa gating modes decreases for a certain parameter denoted by V. The local behaviour of the dispersion curve is of a fluctuating nature. For a g iven core chiral admittance, there is a critical value of the relative permittivity below which propagation is forbidden.