scholarly journals Theoretical analysis of Fresnel reflection and transmission in the presence of gain media

2021 ◽  
Author(s):  
Masud Mansuripur ◽  
Per K. Jakobsen
Keyword(s):  
Theoretical Analysis ◽  
Fresnel Reflection ◽  
Reflection And Transmission ◽  
Gain Media

Body waves in a “real Earth”. Part I

1973 ◽  
Vol 63 (1) ◽  
pp. 145-156 ◽  
Author(s):  
A. Cisternas ◽  
O. Betancourt ◽  
A. Leiva
Keyword(s):  
Exact Solution ◽  
Theoretical Analysis ◽  
Power Series ◽  
Arbitrary Number ◽  
Body Waves ◽  
Reflection And Transmission Coefficients ◽  
Earth Model ◽  
Reflection And Transmission ◽  
Transmission Coefficients ◽  
The Earth

abstract A theoretical analysis of body waves in a “real Earth” is presented. The earth model consists of an arbitrary number of spherical liquid and solid layers. The algebraic part of the analysis deals with the way to obtain generalized rays out of the exact solution. It is shown that the Rayleigh matrix, and not the Rayleigh determinant, should be used to expand the solution into a power series of modified reflection and transmission coefficients in order to obtain rays.

Theoretical investigation of scattering phenomena inside wedge caused by incidence of Rayleigh wave

1984 ◽  
Vol 74 (5) ◽  
pp. 1593-1603
Author(s):  
Shozaburo Takeuchi ◽  
Kazunari Fujii ◽  
Masayoshi Nakano
Keyword(s):  
Theoretical Analysis ◽  
Rayleigh Wave ◽  
Theoretical Investigation ◽  
Rayleigh Waves ◽  
Wedge Angle ◽  
Scattered Wave ◽  
Generation Process ◽  
Two Dimensional ◽  
Reflection And Transmission ◽  
Transmission Coefficients

Abstract A theoretical analysis is performed on the behaviors of the internal scattered wave in the case where a two-dimensional plane Rayleigh wave is incident to an acute- or obtuse-angled wedge. By using the theory in our preceding research (1984), the distributions of energy densities and lines of constant phase of scattered wave are obtained inside the wedge when its angle of corner ranges from 71° to 109°. Momoi's conception (1980) of generation process of reflected and transmitted Rayleigh waves is applied to the above numerically calculated results, by which the complicated variations of reflection and transmission coefficients with wedge angle could be explained to some extent.

Microdiffraction Patterns of Small Metallic Particles II; Theoretical Analysis

1982 ◽  
Vol 40 ◽  
pp. 668-669
Author(s):  
A. Gómez ◽  
P. Schabes-Retchkiman ◽  
M. José-Yacamán ◽  
T. Ocaña
Keyword(s):  
Experimental Data ◽  
Electron Diffraction ◽  
Theoretical Analysis ◽  
Size Range ◽  
Dynamical Theory ◽  
Metallic Particles ◽  
Splitting Effect

The splitting effect that is observed in microdiffraction pat-terns of small metallic particles in the size range 50-500 Å can be understood using the dynamical theory of electron diffraction for the case of a crystal containing a finite wedge. For the experimental data we refer to part I of this work in these proceedings.

Parabolas from Reconstructed Surfaces Observed in Convergent-Beam RHEED Patterns

1990 ◽  
Vol 48 (2) ◽  
pp. 398-399
Author(s):  
M. Gajdardziska-Josifovska
Keyword(s):  
Electron Microscopy ◽  
High Energy ◽  
Two Dimensional ◽  
High Energy Electron ◽  
Reflection And Transmission ◽  
Experimental Diffraction Pattern ◽  
Surface Resonance ◽  
Reconstructed Surfaces ◽  
Reflection Electron Microscopy ◽  
Convergent Beam

Parabolas have been observed in the reflection high-energy electron diffraction (RHEED) patterns from surfaces of single crystals since the early thirties. In the last decade there has been a revival of attempts to elucidate the origin of these surface parabolas. The renewed interest stems from the need to understand the connection between the parabolas and the surface resonance (channeling) condition, the latter being routinely used to obtain higher intensity in reflection electron microscopy (REM) images of surfaces. Several rather diverging descriptions have been proposed to explain the parabolas in the reflection and transmission Kikuchi patterns. Recently we have developed an unifying general treatment in which the parabolas are shown to be K-lines of two-dimensional lattices. Here we want to review the main features of this description and present an experimental diffraction pattern from a 30° MgO (111) surface which displays parabolas that can be attributed to the surface reconstruction.

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