Search academic texts

Information × Registration Number 0221U100538, 0120U104229 , R & D reports Title Quantum phenomena in the interaction of electromagnetic waves with solid-state nanostructures popup.stage_title Head Yampolsky Valerii O., Доктор фізико-математичних наук Registration Date 07-01-2021 Organization O. Ya. Usikov Institute for Radiophysics and Electronics NAS of Ukraine popup.description2  During the 1st stage project, it was shown that layered superconductors, due to their specific nonlinear response to a weak constant magnetic field, are hyperbolic media that can be tuned in a wide THz range. The resonant transparency of a layered superconductor induced by the localized waves excitation with nonmonotonic dispersion was studied. It has been found that a DC magnetic field can adjust the electromagnetic properties of a layered superconductor to observe both specific two-peak and conventional single-beam transmission dependences on the angle of incidence of the wave. The propagation of the Gaussian terahertz beam through a slab of layered conductor when the beam falls normally to the surface was also studied, and the polarization of the radiation is such that the magnetic field lies in the plane of the layers. In this case, the Josephson current between the layers leads to the lensing of radiation instead of scattering. Moreover, due to the nonlinear electrodynamics in the layered superconductor, the focal length and efficiency depend on the amplitude of the radiation. The nonlinear equations for changing the beam width and the curvature of the wave front along the beam are obtained. Product Description popup.authors Apostolov Stanislav S Kadygrob Dmytro V. Kvitka Nina M. Rokhmanova Tetiana M. Tarasov Yurii V Yakovenko Volodymyr M popup.nrat_date 2021-03-17 Close