▎ 摘　　要

The asymmetric Fano resonances (FRs) are noted for the first time in the coherent ballistic transmission spectrum of bilayer graphene tunneling structures. This characteristic tunneling transmission that occurs particularly at small glancing incidence mainly arises due to the quadratic dispersion of chiral charge carriers. The Fano line shape is found to be highly sensitive with respect to the direction of incidence of the charge carriers, the applied homogeneous electric field, as well as to the barrier height and width. The absence of the FR at normal incidence is in accordance with the conservation of chirality of the Dirac fermions in bilayer graphene. The sharp antiresonance at the center of the tunneling band arising due to destructive interference between the electron and the holelike states might be responsible for high negative differential conductivity (NDC) in bilayer graphene.