Now showing items 51-60 of 116
Nonequilibrium distribution in quantum dots lasers and influence on laser spectral output
(The American Institute of Physics, 1999-05-15)
Self-assembled quantum dot structures used for lasers have shown significant variation in the dot size distribution. In this article, we address the issues related to carrier occupation of these dots as a function of ...
Radio frequency plasma processing effects on the emission characteristics of a MeV electron beam cathode
(The American Institute of Physics, 1999-07-05)
Experiments have proven that surface contaminants on the cathode of an electron beam diode influence electron emission current and impedance collapse. This letter reports on an investigation to reduce parasitic cathode ...
The growth of leading-edge distortions on a viscous sheet
(The American Institute of Physics, 1999-02)
The results of a set of experiments to determine some features of the undulations that develop on the leading edge of a sheet of fluid on an inclined plane are presented. A range of fluid viscosities, fluid volumes, and ...
A field-reversed gasdynamic mirror fusion propulsion system
(The American Institute of Physics, 1999-01-22)
Previous studies have shown that the gasdynamic mirror (GDM) fusion propulsion system is capable of producing specific impulses in excess of 105105 seconds and thrusts in the tens of kilonewtons. These propulsive capabilities ...
CP violation in strange baryon decays: A report from Fermilab experiment 871
(The American Institute of Physics, 1999-02-17)
Fermilab experiment 871, HyperCP, is a search for direct CP violation in Ξ and Λ hyperon decays. A non-zero value in the asymmetry parameter A, defined in terms of the decay parameter products αΞαΛαΞαΛ and ,αΞ̄αΛ̄, would ...
The Gaseous Electronic Conference (GEC) reference cell as a benchmark for understanding microelectronics processing plasmas
(The American Institute of Physics, 1999-05)
A collaborative experimental effort was initiated at a workshop at the 1988 Gaseous Electronics Conference (GEC) to start a program to understand the fundamental physics of processing plasmas, as well as give researchers ...
Bistability and self-pulsation in quantum-dot lasers with intracavity quantum-dot saturable absorbers
(The American Institute of Physics, 1999-03-22)
Self-organized In0.4Ga0.6As/GaAsIn0.4Ga0.6As/GaAs quantum-dot single-mode ridge waveguide lasers with intracavity absorber were grown by molecular beam epitaxy. Bistability in the light–current characteristics of 3 μm ...
Dynamic Stress Drop of Recent Earthquakes: Variations within Subduction Zones
(Birkhäuser Verlag; Birkhäuser Verlag Basel, ; Springer Science+Business Media, 1999-05)
—Stress drop is a fundamental parameter of earthquakes, but it is difficult to obtain reliable stress drop estimates for most earthquakes. Static stress drop estimates require knowledge of the seismic moment and fault area. ...
Microstructure of low temperature grown AlN thin films on Si(111)
(The American Institute of Physics, 1999-06-01)
AlN thin films were grown on HF-etched Si(111) substrates at 400–600 °C400–600°C by plasma source molecular beam epitaxy. Reflection high energy electron diffraction and transmission electron microscopy studies show that ...
Ultrafast ytterbium-doped bulk lasers and laser amplifiers
(Springer-Verlag, 1999-07)
We review recent achievements with ultrafast bulk lasers and amplifiers based on Yb:YAG and Yb:glass. Special attention is paid to those aspects of the quasi-three-level nature of these gain media that are important for ...