  We discuss selection rules and intensities of photocurrent of a
two-dimensional electron gas in a strong magnetic field via absorptions of
orbital angular momentum carried by obliquely irradiated optical vortex beams.
By angular deflection, optical vortex beams on the two-dimensional electron gas
interface can be seen as a superposition of the various orbital angular
momentum states. As a result, it is demonstrated that it is yielded that the
angular momentum selection rules and induced currents are modified from the
case of vertical incidence.
