dielectric nonlinearity дiелектрична нелiнiйнiсть - Controllable microwave filters Microwave filters with optical control Optical control Semiconductor microwave filters Semiconductor microwave filters with optical control Semiconductor structures with optical control artificial pyroelectricity conductivity dispersion controlled capacitors dielectric and magnetic susceptibility dielectric parameters control dielectric spectroscopy electrical conductivity electrical polarization ferroelectric ferroelectric phases metamaterials microwave protective materials non-polar crystals paraelectricity paraelectrics permittivity dispersion phase shift polarizability polarization pyroelectric effect relaxor ferroelectrics