Edge‐Channel Photo‐Effect In Asymmetric Two‐Dimensional Systems

We report on the photo‐effect in an asymmetric two dimensional electron system where edge currents are induced by homogeneous terahertz (THz) radiation in tilted magnetic field without any external bias. We discuss the features of the observed effect and its mechanism taking into account properties of edge states in magnetic fields. The process is understood as the quantum Hall effect associated with electron‐hole pairs generated in Landau levels by THz radiation under CR conditions.