Effects of self-focusing on the selfdistortion of amplitude modulated microwaves in non-parabolic semiconductors

Abstract

Omitting the dispersion of side bands, the self-distortion of an amplitude-modulated e.m. signal due to non-linear polarizability in nonparabolic semiconductors has been investigated. The distortion is basically due to self-focusing of the electromagnetic wave and is different from the resistive (absorption) type demodulation. In n-lnSb and at average powers of ~ 1 W the index of modulation is found to increase four times at a modulation frequency ~ 108 s '.