title: Transition radiation on a dynamic periodic interface.
abstract: We investigate the transition radiation on a periodically deformed interface between two dielectric media. Under the assumption that the dielectric permittivities of the media are close, a formula is derived for the spectral-angular distribution of the radiated energy in the general case of a nonstatic profile function for the separating boundary. In particular, the latter includes the case of surface waves propagating along the boundary. The numerical examples are given for triangular grating and for sinusoidal profile. We show that instead of a single peak in the backward transition radiation on a flat interface, for periodic interface one has a set of peaks. The number and the locations of the peaks depend on the incidence angle of the charge and on the period of the interface. The conditions are specified for their appearance.
authors.affiliation: Institute of Applied Problems in Physics, 25 Nersessian Street, 0014 Yerevan, Armenia.|Tomsk Polytechnic University, 30 Lenin Avenue, 634050 Tomsk, Russia.
authors.forename: A R
authors.initials: AR
authors.lastname: Mkrtchyan
authors.affiliation: Tomsk Polytechnic University, 30 Lenin Avenue, 634050 Tomsk, Russia.|National Research Nuclear University MEPhI, 115409 Moscow, Russia.
authors.forename: A P
authors.initials: AP
authors.lastname: Potylitsyn
authors.affiliation: Institute of Applied Problems in Physics, 25 Nersessian Street, 0014 Yerevan, Armenia.|Tomsk Polytechnic University, 30 Lenin Avenue, 634050 Tomsk, Russia.
authors.forename: V R
authors.initials: VR
authors.lastname: Kocharyan
authors.affiliation: Institute of Applied Problems in Physics, 25 Nersessian Street, 0014 Yerevan, Armenia.
authors.forename: A A
authors.initials: AA
authors.lastname: Saharian