AMPLIFICATION OF ULTRASONIC WAVES UNDER DC OPERATING CONDITION IN InSb UNDER TRANSVERSE MAGNETIC FIELD

Abstract
Amplification of ultrasonic waves at 225 MHz up to 20 dB has been achieved by the dc operation in n‐InSb under the transverse magnetic field at 77°K. If we assume that dc and ac mobilities have different dependence on the magnetic field, most of the characteristic features of the observed results are well explained.