The effect of inhomogeneities in acoustic‐surface‐wave amplification
作者:
B.E. Burke,
Abraham Bers,
期刊:
Applied Physics Letters
(AIP Available online 1972)
卷期:
Volume 21,
issue 9
页码: 449-451
ISSN:0003-6951
年代: 1972
DOI:10.1063/1.1654451
出版商: AIP
数据来源: AIP
摘要:
We present the results of a theoretical analysis of acoustic‐surface‐wave amplification by a sheet of electrons whose density and drift velocity vary along the common direction of acoustic wave propagation and electron drift. Such inhomogeneities not only may result from doping variations but are inherent for drifting electrons at the surface of a semiconductor because of fringing electric fields due to the applied dc potential. We propose the results as a possible explanation of the observed inability of such amplifiers to reach the maximum gain predicted by the homogeneous amplifier theory.
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