Now showing items 21-30 of 82
Equation formulation considerations for efficient numerical modeling of semiconductor phenomena
(Elsevier, 1975-09)
This paper highlights the importance of equation formulation and associated programming efficiency with respect to modeling of semiconductor phenomena via numerical methods.Two numerical modeling efforts are developed in ...
Ultrafast gating using a nonlinear Sagnac interferometer
(Elsevier, 1992-03-15)
We show theoretically and experimentally that Sagnac interferometers which include a medium which exhibits gain or absorption can be used to obtain picosecond or femtosecond optical gates with very high contrast and good ...
Equivalence of the thin-grating decomposition and coupled-wave analysis of thick holographic gratings
(Elsevier, 1975-10)
The method of thin grating decomposition, which is derived entirely from thin-grating diffraction theory, is shown analytically to be equivalent to the coupled-wave solution of Maxwell's equations for a thick sinusoidal grating.
Transient analysis of the TRAPATT mode in avalanche diodes
(Elsevier, 1978-10)
The start-up transient behavior of the TRAPATT mode of oscillation in both n+pp+ and p+nn+ Si avalanche diodes is studied by computer simulation in the time domain through a device-circuit interaction program. The start-up ...
Numerical investigation of mesh size convergence rate of the finite element method in MESFET simulation
(Elsevier, 1981-06)
The mesh size convergence rate of the finite element method in two-dimensional GaAs MESFET simulation has been investigated numerically. The equations governing MESFET operation and the finite element formulation of these ...
Structure and morphology of magnetron sputtered CoCr thin films
(Elsevier, 1991-12-02)
The growth characteristics of magnetron sputtered Co-22%Cr thin films on amorphous glass or carbon substrates have been investigated utilizing transmission electron microscopy, X-ray diffraction and electrical resistivity ...
Mapping of spectral density functions using heteronuclear NMR relaxation measurements
(Elsevier, 1992-06-15)
A method is proposed for direct mapping of spectral density functions of the rotational motions of H-X bond vectors, such as 1H---15N, by measuring a set of NMR relaxation parameters. The well known and frequently measured ...
Transient Responses of a Heterogeneous Spin System to Binomial Pulse Saturation
(Elsevier, 1993-03)
The transient responses of a heterogeneous spin system to binomial pulses applied at the free-water resonance frequency are obtained by solving the Bloch equations pertaining to such a system modeled by a pair of binary ...
Geometrical optimization of longitudinally pumped solid-state lasers
(Elsevier, 1991-12-01)
We use a simplified analysis of gain saturation in longitudinally pumped lasers or amplifiers to study the effect of the relative pump and laser beam size. We derive a simple rule of thumb allowing one to optimize the efficiency.