Accession Number : ADA303530

Title :   Theoretical Investigation of Current Instabilities and Terahertz Oscillations in a Two-Dimensional Electron Fluid.

Descriptive Note : Final technical rept. Nov 94-Dec 95,

Corporate Author : AKADEMIYA NAUK SSSR LENINGRAD FIZIKO-TEKHNICHESKII INSTITUT

Personal Author(s) : Dyakonov, M. I.

PDF Url : ADA303530

Report Date : 22 DEC 1995

Pagination or Media Count : 10

Abstract : The purpose of this work is to develop a physical theory of novel mechanisms for generation and detection of electromagnetic radiation in the terahertz range using the plasma oscillations of the two dimensional electron fluid in a Field Effect Transistor (FET). It was shown previously hy M.I.Dyakonov and M.S.Shur that the motion of the electrons in a FET under certain conditions is described by hydrodynamic equations which coincide with those for shallow water, and that the current carrying state is unstable against plasma wave generation in the terahertz frequency range.ln this work we have (l) Developed a nonlinear theory of plasma oscillations build up as a result of this instability (2) Studied a new mechanism leading to current saturation in a FET, which is similar to the 'choking' effect in conventional hydrodynamics (3) Studied the influence of boundary condition at the source and the drain on the instability threshold, as well as the role of the viscosity of the electron fluid (4) Considered other mechanisms of instability and plasma wave generation in the electron fluid.

Descriptors :   *FIELD EFFECT TRANSISTORS, *HYDRODYNAMIC CODES, *PLASMA OSCILLATION, TWO DIMENSIONAL, THRESHOLD EFFECTS, THEORY, ELECTRON GAS, SATURATION, NONLINEAR SYSTEMS, ELECTROMAGNETIC RADIATION, RUSSIA, PLASMA WAVES, PLASMA INSTABILITIES.

Subject Categories : Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE