Some approaches to solving the inverse problem of reconstruction of the permittivity profile
of multilayer dielectric structure developed by Ukrainian authors are under consideration. A …

Lanthanide-doped upconversion nanoparticles (UCNPs) are attractive luminescent
materials for nanophotonic applications under near-infrared excitation, but their full potential …

We review the main results of the development of whispering gallery mode (WGM)
resonators and their unique applications due to their quasi-optical functionality. Several …

Dielectric resonators are key elements in many applications in micro to millimeter wave
circuits, including ultra-narrow band filters and frequency-determining components for …

The normalized eigenfrequencies in spherical cavities filled with uniaxial, biaxial, and
gyroelectric medium are calculated, and the corresponding modal analysis is performed. A …

A new method of microwave generation in a system with high-Q quasi-optical cylindrical
dielectric resonator (CDR) excited by an azimuthal-periodic electron beam current is …

Whispering gallery modes (WGMs) were exited in a new type of microstrip circular resonator
formed under a conducting disc placed directly on or above a continuous dielectric layer …

In this paper, we report the complex resonant frequencies of inhomogeneous anisotropic
spherical resonators. The anisotropy can be of gyroelectric or gyromagnetic type, having …

The surface impedance characteristics of epitaxial YBa 2 Cu 3 O 7− δ films of thickness df=
75, 150, 300, 600 nm, produced by magnetron thermal co-evaporation onto single crystal …

A new type of planar high-Tc superconductor (HTS) resonator, proposed by the authors, is
described. Its feature is excitement with whispering gallery modes (WGM) unlike the known …