Low Temperature Physics: 37, 903 (2011); https://doi.org/10.1063/1.3673537 (10 pages)
Fizika Nizkikh Temperatur: Volume 37, Number 11 (November 2011), p. 1136-1147 ( to contents , go back )
Nonlinear effects in radio wave propagation through metals (Review Article)
Санкт-Петербургский государственный электротехнический университет "ЛЭТИ" ул. проф. Попова, 5, г. Санкт-Петербург, 197376, Россия
Национальный исследовательский ядерный университет "МИФИ" Каширское шоссе, 31, г. Москва, 115409, Россия
Received March 14, 2011
The fundamental results of studies into the effect of nonlinearity on radio wave propagation through metals placed in a dc magnetic field are considered. The capture of carriers by the magnetic field of a large amplitude rf wave suppresses collisionless absorption and causes various wave to appear. Propagation of helicon waves may occur in copper in a geometry where there are open orbits on its Fermi surface. The decrease in cyclotron absorption by holes that exists at all wavelengths in zink in the linear regime makes possible propagation of an electron dopleron. Propagation of new nonlinear waves not having analogs in the linear regime becomes possible in noble and third group metals at low magnetic fields where no waves exist in the linear regime. Multiple reflections of nonlinear waves from the metal slab inner surfaces give rise to standing waves in the specimen. In this case the dependence of surface resistivity of the slab on dc magnetic field displays resonant maxima. At the maxima the transparency of metal with respect to radio emission may increase by one or two orders of magnitude.
PACS: 72.20.Ht High-field and nonlinear effects
Key words: metals, radiowaves, collisionless absorption, nonlinearity.