Abstract

The effect of magnetic field on propagation of electromagnetic waves through free carrier plasmas in semiconductors is discussed. The Faraday configuration and the parameter ranges ωc,ωpω and ωcτ−1 are specifically considered. Dispersion of helicon waves, propagation near the magnetoplasma edge and (ωp2 = ωωc), the Faraday rotation are developed in terms of the one-electron Drude theory. Microwave transmission measurements at 35 Gc/s on n-type InSb are presented. Experiments near the magnetoplasma edge yield the value of the static dielectric constant of the InSb lattice Kl = 19.3 ± 0.8. Faraday rotation, observed beyond the edge, is found to be extremely large. Some practical possibilities for this effect are considered.

© 1967 Optical Society of America

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