  We report the observation of the resonant excitation of edge photocurrents in
bilayer graphene subjected to terahertz radiation and a magnetic field. The
resonantly excited edge photocurrent is observed for both inter-band (at low
carrier densities) and intra-band (at high densities) transitions between
Landau levels (LL). While the intra-band LL transitions can be traced to the
classical cyclotron resonance (CR) and produce strong resonant features, the
inter-band-LL resonances have quantum nature and lead to the weaker features in
the measured photocurrent spectra. The magnitude and polarization properties of
the observed features agree with the semiclassical theory of the intra-band
edge photogalvanic effect, including its Shubnikov-de-Haas oscillations at low
temperatures.
