Analysis on different types of imperfect interfaces between two dissimilar piezothermoelastic half-spaces on reflection and refraction phenomenon of plane waves

2019 ◽  
pp. 1-30 ◽  
Author(s):  
S. Guha ◽  
A. K. Singh ◽  
A. Das
Keyword(s):  
Plane Waves ◽  
Imperfect Interfaces ◽  
Reflection And Refraction ◽  
Different Types

scholarly journals Notes on reflection and refraction of evanescent plane waves on the boundary between gainy/lossy media

2020 ◽  
Vol 71 (4) ◽  
pp. 227-236
Author(s):  
Jozefa Červeňová ◽  
Rastislav Dosoudil ◽  
Jaroslav Franek ◽  
L’ubomír Šumichrast
Keyword(s):  
Plane Wave ◽  
Plane Waves ◽  
Planar Boundary ◽  
Reflection And Transmission ◽  
Reflection And Refraction ◽  
Dielectric Media ◽  
Homogeneous Plane ◽  
Lossy Media

AbstractReflection and transmission (refraction) of a homogeneous plane wave at the planar boundary of two dielectric media is a well known phenomenon commonly treated in nearly all standard textbooks. Here the analysis of reflection and refraction of evanescent plane waves on the planar boundary between various combinations of lossy, gainy and lossless media is performed. It is shown that by the appropriate choice of the profile of evanescence various effects can take place.

X-ray intensity patterns from finite perfect crystals

1999 ◽  
Vol 55 (6) ◽  
pp. 1000-1013
Author(s):  
Gunnar Thorkildsen ◽  
Helge B. Larsen
Keyword(s):  
Theoretical Study ◽  
Plane Waves ◽  
X Ray ◽  
Characteristic Lines ◽  
Different Types ◽  
Infinite Crystal ◽  
Lateral Crystal ◽  
Slit System ◽  
Green Technique ◽  
The Waves

A theoretical study dealing with intensity interference patterns from the exit surfaces of finite perfect t\times l crystals has been undertaken using the Takagi–Taupin equations and the Riemann–Green technique. Numerical simulations have been performed for the 220 reflection in diamond allowing for different types of amplitude-modulated incoming plane waves. The effects caused by limiting the waves by a slit system are also discussed. The results show strong influence of the lateral crystal boundaries and are closely related to the geometrical region structures formed by the characteristic lines associated with the equations. In the limit of a semi-infinite crystal, the Borrmann–Lehmann interference patterns are retrieved.

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