Results 261 to 270 of about 2,748,623 (319)

Barrier and well width study of InGaN/GaN multiple quantum wells

1997 Digest of the IEEE/LEOS Summer Topical Meeting: Vertical-Cavity Lasers/Technologies for a Global Information Infrastructure/WDM Components Technology/Advanced Semiconductor Lasers and Applications/Gallium Nitride Materials, Processing, and Devices (C, 2002
InGaN multiple quantum wells have proven critical for the achievement of laser diodes in the (Ga,Al,In)N system. We have studied the effects of barrier width and well width in MQW structures for use in laser diodes.
A.C. Abare, S. Keller, M.P. Mack, L.A. Coldren, S.P. DenBaars   +4 more
openaire   +1 more source

THE WIDTH RATIO OF TWO BARRIERS IN RESONANT TUNNELING

Modern Physics Letters B, 2003
Numerical calculations by a transfer matrix method have been performed to obtain the transmission coefficient of rectangular double barrier structures. The dependence of the well width, barrier width and the barrier height was systematically investigated.
openaire   +1 more source

Evolution of the Pulse Width in Dielectric Barrier Atmospheric Pressure Discharge

Plasma Science and Technology, 2012
A study of the evolution of the pulse width in homogeneous dielectric barrier discharge at atmospheric pressure with helium as the working gas is reported by using a one-dimensional fluid model. In this paper, a new computational method is presented to estimate the pulse width through calculating the time interval between the breakdown voltage and the ...
Xinxin Song, Zhenyu Tan, Bo Chen, Yuantao Zhang, Qingquan Li   +4 more
openaire   +1 more source

Research on High Crashworthiness Level Bridge Barrier with Limited Working Width

Applied Mechanics and Materials, 2013
The distance between barriers of lower deck and bridge piers of upper deck is small in Luotang River Double-Deck Viaduct. And so impact accidents with barriers of lower deck will result in vehicle frontal impact with bridge piers of upper deck, which will cause serious consequences for the main structure of bridge.
Shu Ming Yan, Ning Jia, Xin Wang, Liang Ma, Xiang Zhang, De He Li, Ya Ping Liang   +6 more
openaire   +1 more source

Well Width Determination in Rectangular Double‐Barrier Quantum‐Well Structures

physica status solidi (b), 1988
Determination et discussion de la relation entre la largeur du puits et la hauteur de la barriere de potentiel dans des conditions de resonance pour des structures de type ABABA et ABCBA. On montre que les structures a double barriere de type ABCBA peuvent etre interessantes pour la fabrication de dispositifs a effet ...
openaire   +1 more source

Development and Testing of the Manitoba Constrained Width Tall Wall Barrier

Transportation Research Record: Journal of the Transportation Research Board, 2017
This project in Manitoba, Canada, developed a single-slope concrete barrier system with a height of 1,250 mm and a base width of no more than 600 mm. Configurations for bridge rail, roadside, and median barrier applications were developed and optimized to minimize installation costs while satisfying the AASHTO Manual for Assessing Safety Hardware ...
Scott K. Rosenbaugh, Jennifer D. Schmidt, Harald P. Larsen, Ronald K. Faller, Andrew Pankratz   +4 more
openaire   +1 more source

Fin-channel orientation dependence of forward conduction in kV-class Ga2O3 trench Schottky barrier diodes

Applied Physics Express, 2019
Ga2O3 vertical trench Schottky barrier diodes with four different fin-channel orientations are realized on (001) substrates and compared. Fin-channels along the [010] direction with (100)-like sidewalls result in the highest forward current, while other ...
Wenshen Li, K. Nomoto, Zongyang Hu, D. Jena, H. Xing   +4 more
semanticscholar   +1 more source

Effective sweep-width for barrier missions against an evasive target

The Journal of Defense Modeling and Simulation: Applications, Methodology, Technology, 2019
An effective sweep-width, to be used in predicting the performance of a barrier patrol against a smart, evasive intruder is defined. Following Washburn’s example for a two-dimensional area search, the nominal sweep-width of the searcher is reduced to account for the target’s evasive ability.
openaire   +1 more source

On the effect of the barrier widths in the InAs/AlSb/GaSb single-barrier interband tunneling structures

Journal of Applied Physics, 1990
The dependence of the interband tunneling current on AlSb barrier widths is studied in the InAs/AlSb/GaSb single-barrier diode structures. The experimental results show that the peak current density displays an exponential dependence on the barrier width.
J. F. Chen, L. Yang, M. C. Wu, S. N. G. Chu, A. Y. Cho   +4 more
openaire   +1 more source

Brownian motion through potential barriers with different shape, width, and height

AIP Conference Proceedings, 1993
The Brownian motion in different piecewise linear (‘‘triangular’’ and ‘‘step like’’) and in piecewise parabolic metastable potential profiles are considered. The exact life times of the metastable states are presented and discussed. The limitations of the Kramers’ formula are given.
V. N. Agudov, A. N. Malakhov, A. L. Pankratov   +2 more
openaire   +1 more source