Anomalous penetration of an electromagnetic signal in a thin metallic plate under strong magnetodynamic nonlinearity conditions

A new phenomenon of anomalous transparency of a metallic plate upon the passage of a strong transport current is predicted. It is shown that the electromagnetic field of an incident wave may be carried from the skin layer to the opposite face by electrons trapped by the alternating intrinsic magnetic field of the transport current even under the conditions of the extremely anomalous skin effect for which the skin depth is the smallest parameter having the dimensions of length. The mechanism of the rf field transport effectively operates at low temperature, when the mean free path of charge carriers is large. The wave field distribution in the plate is analyzed. The cyclotron resonance at trapped electrons, which emerges due to their periodic return to the skin layer, is predicted and qualitatively analyzed.