Browse Dissertations and Theses - Electrical and Computer Engineering by Contributor "Hess, Karl"

• (1988)
We investigate acoustic deformation potential scattering in Al$\sb{\rm x}$Ga$\sb{1-\rm x}$As/GaAs modulation doped heterojunctions. We review previous measurements of the deformation potential constant Z and discuss the ...

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• (1994)
A new multiscale method is presented for modeling charge transport across a semi-conductor heterointerface. It has the advantage of increase predictive power due to its treatment of the detailed mixing between Bloch and ...

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• (2002)
The tool combines TCAD simulation, short-time tests and novel solutions to the SiO2 and Si-SiO2 defect generation rate equations (in time and space) under static and dynamic operation. The predicted failure statistics are ...

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• (1992)
Aspects of high field transport related to hot electron reliability effects are investigated--with special emphasis, the phenomenon of impact ionization. Both the ionization rate itself and its effect on bulk semiconductor ...

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• (2000)
In response to the growing importance of vertical cavity surface emitting lasers (VCSELs), the semiconductor laser simulator Minilase has been extended to allow simulation of VCSEL devices. The fundamental physics of VCSELs ...

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• (1990)
In this thesis the methods and results of numerical simulations of femtosecond laser spectroscopy experiments in Al$\sb{x}$Ga$\sb{1-x}$As quantum well structures and bulk GaAs are presented. Photoexcited carriers are modeled ...

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• (1996)
A self-consistent one-dimensional vertical-cavity surface-emitting laser (VCSEL) simulator has been developed. The model incorporates drift-diffusion with carrier-capture and thermionic emission in the quantum regions. ...

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• (1988)
In this thesis the transient and steady-state behavior of various GaAs/Al$\sb{\rm x}$Ga$\sb{\rm 1-x}$As heterostructure devices which have shown promise for both high-speed digital and microwave applications is examined. ...

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• (1994)
A fully two-dimensional self-consistent quantum well laser simulator called Minilase has been developed. Both the optical and electronic device equations that describe a laser diode are discussed in detail. The dark and ...

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• (2007)
Our novel method provides a bridge between the continuum picture and microscopic properties. It encompasses both steady-state and transient simulations. This method is a promising component to be integrated into the ...

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• (1989)
In this thesis physical effects due to the reduced size of semiconductor devices are investigated theoretically. Effects due to statistical fluctuations and boundary conditions at heterointerfaces are examined, specifically, ...

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• (1993)
The III-V compound semiconductor devices employing quantum well (QW) structures play an essential role in the field of optoelectronics. This thesis focuses on the quantum mechanical aspects of electron dynamics and relaxation ...

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• (1989)
In this thesis, the transport of electrons in silicon devices is studied numerically by solving the semiclassical Boltzmann transport equation using the Monte Carlo method. The important cases which are analyzed include ...

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• (2002)
We have developed a fully self-consistent and coupled electronic-thermal-optical simulator for vertical cavity surface emitting lasers (VCSELs). The lattice temperature model is derived based on carrier transport and the ...

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• (1995)
The possibility of carrier charge imbalance in the active region of quantum well lasers is demonstrated (in contrast to the usual presumption of charge neutrality in the region), and the resulting effect on the threshold ...

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• (1990)
A versatile, two-dimensional simulator for various types of semiconductor lasers for both steady and transients has been developed. The simulator is capable of spectral analysis of quantum-well semiconductor lasers, such ...

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