We develop a theoretic description of the photogalvanic current induced by a high frequency radiation in asymmetric nanostructures and show that it describes well the results of numerical simulations. Our studies allow to understand the origin of the electronic ratchet transport in such systems...

The a.c. electric field distribution is studied in composite, containing materials with small local losses. The possibility that a 2D two-component system can have effective absorption in the absence of local absorption was evidenced (A.M. Dykhne, Zh. Eksp. Teor. Fiz. 59 (1970) 110). We study...