Abstract: According to the Maxwell equations and constitutive relations in chiral medium, the paper studies the dispersion characteristic of a symmetric slab waveguide with a chiral negative refractive medium. With the normalized frequency and propagation factor, dispersion equations expressed with normalized parameters are derived in a slab waveguide with a chiral negative refractive medium. Numerical results show that the chiral parameter has great influence on the dispersion characteristic of a slab waveguide. When the relative chiral parameter is 0.047 7, the zero order mode of a left-handed polarized wave disappears. When it is greater than 1, the core becomes a chiral negative refractive medium and the zero-order mode exists. In addition, the tendency of dispersion curves in slab wave-guide is compared with a chiral negative refractive medium and that with a general chiral medium.

Key words: chiral, dispersion characteristic, negative refractive, normalize, slab waveguide