期刊
MICROELECTRONICS JOURNAL
卷 34, 期 4, 页码 231-235出版社
ELSEVIER ADVANCED TECHNOLOGY
DOI: 10.1016/S0026-2692(03)00003-X
关键词
negative differential mobility; superheterodyne amplification; n-GaAs film
A superheterodyne amplification of sub-millimeter electromagnetic waves in GaAs due to the negative differential mobility is analyzed. The nonlinearity arises from the modulation of concentration, due to a space charge wave, and from the ponderomotive force, due to electromagnetic waves. The case of resonant interaction of two traveling counter propagating electromagnetic waves and the space charge wave in a thin n-GaAs film placed into a dielectric waveguide is considered. The case of 2D electron gas is also analyzed. The simulation of this nonlinear interaction shows a certain increment of the amplification. (C) 2003 Elsevier Science Ltd. All rights reserved.
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