scholarly journals Channeling of a subangstrom electron beam in a crystal mapped to two-dimensional molecular orbitals

2012 ◽  
Vol 86 (19) ◽  
Author(s):  
Robert Hovden ◽  
Huolin L. Xin ◽  
David A. Muller
Keyword(s):  
Electron Beam ◽  
Molecular Orbitals ◽  
Two Dimensional

scholarly journals Nonlinear processes in the bunched electron beams of high-power klystrons and the limits of analytical and one-dimensional numerical models applicability for their analysis.

2020 ◽  
Vol 2020 (12) ◽  
Author(s):  
V.Y. Rodyakin ◽  
◽  
V.M. Pikunov ◽  
V.N. Aksenov ◽  
◽  
...  
Keyword(s):  
Electron Beam ◽  
High Power ◽  
Numerical Models ◽  
Nonlinear Effects ◽  
Analytical Models ◽  
Modulation Amplitude ◽  
Two Dimensional ◽  
One Dimensional ◽  
Charge Parameter ◽  
Program Data

We present the results of a comparative theoretical analysis of the electron beam bunching in a single-stage klystron amplifier using analytical models, a one-dimensional disk program, and a two-dimensional program. Data on the influence of various one-dimensional and two-dimensional nonlinear effects on the efficiency of electron beam bunching at different values of the space charge parameter and the modulation amplitude are presented. The limits of applicability of analytical and one-dimensional numerical models for electron beam bunching analysis in high-power klystron amplifiers are found.

Formation Of Two-Dimensional Photonic Crystals With Cavities Arrays In Silicon

2016 ◽  
Vol 11 (1) ◽  
pp. 88-93
Author(s):  
Dmitriy Utkin ◽  
Aleksandr Shklyaev ◽  
Fedor Dultsev ◽  
Aleksandr Latyshev
Keyword(s):  
Electron Beam ◽  
Photonic Crystals ◽  
Electron Beam Lithography ◽  
Spatial Distributions ◽  
Two Dimensional ◽  
Interference Effects ◽  
Technological Parameters ◽  
Beam Interaction ◽  
Cavity Array ◽  
Better Than

Specific aspects of finely focused electron beam interaction with the PMMA-950K resist for the fabrication of closely spaced holes having inhomogeneous spatial distributions are studied. The technological parameters for the creation of two-dimensional photonic crystals with microcavities (missing holes) arrays, which allow obtaining the lateral sizes of the structure within the accuracy better than 2 %, in silicon using electron-beam lithography are determined. Such holes fabrication accuracy is thought to be sufficient to study the interference effects of cavity array radiation in twodimensional photonic crystals.

Two-dimensional modeling image of space charge migration in a needle-like electron beam plasma

2019 ◽  
Vol 26 (2) ◽  
pp. 023518
Author(s):  
Xiaoyan Bai ◽  
Chen Chen ◽  
Hong Li ◽  
Wandong Liu ◽  
Wei Chen
Keyword(s):  
Electron Beam ◽  
Space Charge ◽  
Two Dimensional ◽  
Charge Migration ◽  
Dimensional Modeling ◽  
Beam Plasma ◽  
Electron Beam Plasma

scholarly journals On the correctness of mathematical models of time-of-flight cathodoluminescence of direct-gap semiconductors

2019 ◽  
Vol 30 ◽  
pp. 07014
Author(s):  
Mikhail A. Stepovich ◽  
Dmitry V. Turtin ◽  
Elena V. Seregina ◽  
Veronika V. Kalmanovich
Keyword(s):  
Electron Beam ◽  
Gallium Nitride ◽  
Initial Data ◽  
Mathematical Models ◽  
Single Crystal ◽  
Three Dimensional ◽  
Time Of Flight ◽  
Semiconductor Material ◽  
Two Dimensional ◽  
Cathodoluminescence Intensity

Two-dimensional and three-dimensional mathematical models of diffusion and cathodoluminescence of excitons in single-crystal gallium nitride excited by a pulsating sharply focused electron beam in a homogeneous semiconductor material are compared. The correctness of these models has been carried out, estimates have been obtained to evaluate the effect of errors in the initial data on the distribution of the diffusing excitons and the cathodoluminescence intensity.

An Instructional Two-Dimensional Diffraction Laboratory Using Patterns Created with Electron-Beam Lithography

2002 ◽  
Vol 760 ◽  
Author(s):  
Colin Inglefield ◽  
Royce Anthon
Keyword(s):  
Electron Beam ◽  
Undergraduate Students ◽  
Electron Beam Lithography ◽  
Materials Science ◽  
Reciprocal Lattice ◽  
Real Space ◽  
Two Dimensional ◽  
Solid State Physics ◽  
Modern Physics ◽  
Order Of Magnitude

ABSTRACTAn instructional laboratory in two-dimensional diffraction is discussed. The experiment is appropriate for undergraduate students in materials science, solid-state physics (as was the case with our group), modern physics, or optics. The experiment is performed using visible light from a laser incident on a 2D lattice of gold dots deposited with electron beam lithography on a glass substrate. The pattern is microscopic with a lattice constant on the same order of magnitude as the wavelength of light used. Students observe the diffraction pattern, and then quantitatively determine the positions of maxima. These data are used by the students to reconstruct the (real space) microscopic lattice. The students can simulate the experiment with software that computes reciprocal lattice and diffraction patterns for an arbitrary 2D lattice.

scholarly journals Two-dimensional structures of ferroelectric domain inversion in LiNbO3 by direct electron beam lithography

2003 ◽  
Vol 93 (12) ◽  
pp. 9943-9946 ◽  
Author(s):  
J. He ◽  
S. H. Tang ◽  
Y. Q. Qin ◽  
P. Dong ◽  
H. Z. Zhang ◽  
...  
Keyword(s):  
Electron Beam ◽  
Electron Beam Lithography ◽  
Ferroelectric Domain ◽  
Two Dimensional ◽  
Domain Inversion

Fast nanopatterning of two-dimensional photonic crystals by electron beam lithography

2004 ◽  
Vol 36 (1-3) ◽  
pp. 265-270 ◽  
Author(s):  
T. Stomeo ◽  
A. Passaseo ◽  
R. Cingolani ◽  
M. De Vittorio
Keyword(s):  
Electron Beam ◽  
Photonic Crystals ◽  
Electron Beam Lithography ◽  
Two Dimensional
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