  The present investigation involves explorations on the chromo-dielectric
properties of the hot QCD medium produced in relativistic heavy-ion collisions
in terms of refractive index. The isotropic/equilibrium modelling is done
within an effective quasi-particle model of hot QCD medium. The possibilities
of negative refraction in the medium are also explored in terms of the
Depine-Lakhtakia index. The anisotropic aspects of the hot QCD medium are
incorporated by introducing the anisotropy in a particular direction. That
makes the medium quite similar to uniaxial crystals, and hence we observe
phenomenon of birefringence ( two distinct refractive indices in the
anisotropic case). Interestingly, both anisotropy and medium effects play
significant roles in deciding the optical properties of the hot
QCD/Quark-Gluon-Plasma (QGP) medium.
