An investigation is made of a strong anisotropy of the Joule absorption of submillimeter radio waves near a plasma resonance in InSb in weak magnetic fields of less than 100 G. The decrements ...describing resonant damping of the waves polarized along and across the magnetic field may differ by an order of magnitude. The dependence of the resonant damping on the carrier temperature is strong. These effects can be used in constructing fast-response submillimeter modulators, polarizers, and frequency filters controlled by an external magnetic field.
An experimental study was made of the 'induced' absorption in germanium accompanying the combined action of CO2 and Nd lasers. Measurements were made of the rate of recombination of carriers excited ...by the Nd laser radiation. It was found that surface recombination plays an important role even at moderate radiation intensities. A theoretical model is proposed for the combined effects.
