We prove that two kinds of coupled TM-TE focus wave modes can propagate in
a biisotropic medium, and we consider what happens when a TM or TE focus wa
ve mode impinges from a vacuum on a slab made of a biisotropic material. We
get the amplitudes of the reflected and refracted waves in a chiral slab.
(C) 2000 MAIK "Nauka/Interperiodica".