AMPLIFICATION OF AN ELECTROMAGNETIC-WAVE IN THE POLARITON MODE OF MAGNETOPLASMA

The magnetoplasma amplification theory in an ionic semiconductor cryst al is further expanded. A new type of a magnetoplasma amplification ut ilizes the phonon as an oscillator. The Lorentz force in the Voigt con figuration causes the interaction between the electrons' space-charge wave, the optical phonon, and the electromagnetic wave. In the Reststr ahlen frequency range, the induced dielectric constant dispersion prov ides a slow-wave structure and causes a phase shift in the waves, whic h are combined in drifting synchronization. It results in a traveling wave instability. The new amplifications appear very near the transver se phonon frequency and the longitudinal phonon frequency, respectivel y, corresponding to the forward-wave coupling and backward-wave coupli ng.