“New” Ginzburg-Pekar waves in the microwave range in ice

The recently discovered effect of microwave radiation spatial dispersion in freshwater ice is studied experimentally. This effect, first studied by Ginzburg and Pekar, shows up most vividly in the emergence of new waves that have the same polarization as the primary wave but different wavevectors. In the case of monochromatic radiation, four waves with different wavevectors may coexist in the medium. Interference of these waves may explain anomalies in the electromagnetic properties of the glacial structures observed earlier. New experimental results on the polarization properties of the signal transmitted through ice corroborate the spatial dispersion in the microwave range.