Ultrasonic Amplification in CdS

TLDR

Radiofrequency waves at 15 and 45 MHz are transduced into pressure waves and applied to a CdS crystal. A second transducer converts these pressure waves back into an RF output wave. Signal amplification depends on illumination intensity and the electric field parallel to the pressure waves, with positive gain achievable at suitable field values. T.F.H.

Abstract

Radiofrequency waves at 15 and 45 Mc are transduced into pressure waves at the same frequencies, and are applied to a CdS crystal. The waves are then converted by a second transducer into a r-f output wave. The signal amplification is found as a function of the illumination intensity on the crystal, and the electric field parallel to the pressure waves. Positive gain may be attained for suitable values of the electric field. (T.F.H.)