Probing mirror anomaly and classes of Dirac semimetals with circular dichroism

We theoretically investigate the optical activity of three dimensional Dirac semimetals (DSMs) using circular dichroism (CD). show that DSMs in presence a magnetic field any one mirror-symmetric planes materials exhibit notable dichroic behavior. In particular, for different orientations light with respect to plane, CD type-II can detect mirror anomaly by showing sharply distinct patterns at angle. Interestingly, also distinguish having only point time-reversal invariant momentum from type-I pair points on rotation axis crystals.