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|Title:||Monte Carlo simulation of quasi-one-dimensional semiconductors|
|Author(s):||Briggs, Stephen Jeffrey|
|Doctoral Committee Chair(s):||Leburton, Jean-Pierre|
|Department / Program:||Electrical and Computer Engineering|
|Discipline:||Electrical and Computer Engineering|
|Degree Granting Institution:||University of Illinois at Urbana-Champaign|
|Subject(s):||Physics, Electricity and Magnetism
Physics, Condensed Matter
|Abstract:||Because of the particular confinement configuration of one-dimensional systems, the absence of angular randomization during scattering makes the carrier distribution sensitive to external perturbations and causes appreciable deviations from the equilibrium relatively rapidly. A Monte Carlo simulation is presented of a multisubband quasi-one-dimensional gallium arsenide-aluminum gallium arsenide structure. The model includes multiple subbands, polar optic and acoustic phonons, intervalley scattering, and band structure non-parabolicity.
The linear approximation to the Boltzmann Transport Equation is found to be inconsistent for fields as low as 50 V/cm. A situation occurs under longitudinal field conditions where an upper subband population is enhanced with respect to the bottom subband. Intersubband optical transitions with the possibility of far-infrared stimulated emission seem to be significant.
Differential mobility in excess of twice the bulk value at 300 K is obtained. The simulation estimates the time required for electrons to undergo intervalley scattering to three-dimensional states to be in the range of 4 nsec down to 1 psec for fields in the range of 100 V/cm to 8 kV/cm. The corresponding distances in the wire vary from 130 $\mu$m down to the submicron range.
|Rights Information:||Copyright 1990 Briggs, Stephen Jeffrey|
|Date Available in IDEALS:||2011-05-07|
|Identifier in Online Catalog:||AAI9114182|
This item appears in the following Collection(s)
Dissertations and Theses - Electrical and Computer Engineering
Dissertations and Theses in Electrical and Computer Engineering
Graduate Dissertations and Theses at Illinois
Graduate Theses and Dissertations at Illinois