Reflection and transmission of Rayleigh waves by the edge of a deposited thin film

1974 ◽  
Vol 55 (4) ◽  
pp. 738-743 ◽  
Author(s):  
Tsukasa Yoneyama ◽  
Shigeo Nishida
Keyword(s):  
Thin Film ◽  
Rayleigh Waves ◽  
Reflection And Transmission

Optical and electrical properties of Ge10+xSe40Te50−x thin film

2001 ◽  
Vol 16 (6) ◽  
pp. 1549-1553 ◽  
Author(s):  
S. A. Fayek ◽  
M. El-Ocker ◽  
A. S. Hassanien
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Optical Band Gap ◽  
The Other ◽  
Electrical Activation ◽  
Optical And Electrical Properties ◽  
Vacuum Deposition ◽  
Band Tail ◽  
Reflection And Transmission ◽  
Opposite Behavior

Thin films with thickness 100 nm of Ge10+xSe40Te50−x (x ranging from 0.0 to 16.65 at.%) were formed by vacuum deposition at 1.33 × 10−4 Pa. The change in electrical resistivity of the films has been measured using the coplanar method. The measurements have been carried out in a temperature range between 400 and 142 K. The values of the electrical activation energies lie in the range of 0.18–0.38 eV. The optical absorption behavior of these ternary thin films was studied from the reflection and transmission. The optical band gap was found to be in the range of 0.90–1.11 eV and arose from indirect transitions. On the other hand, the width of the band tail Ee was found in the range 0.19–0.32 eV and exhibits opposite behavior. This behavior is believed to be associated with a defected bond of Te–Te and a cohesive energy (CE).

Reflection and transmission of obliquely incident Rayleigh waves at a vertical discontinuity between two welded quarter-spaces

1979 ◽  
Vol 69 (5) ◽  
pp. 1409-1423
Author(s):  
Thomas C. Chen ◽  
Leonard E. Alsop
Keyword(s):  
Free Surface ◽  
Phase Velocity ◽  
Rayleigh Waves ◽  
Velocity Ratio ◽  
Normal Incidence ◽  
Angle Of Incidence ◽  
Reflection And Transmission ◽  
Obliquely Incident ◽  
Vertical Boundary ◽  
Diffraction Effects

abstract We use an approximate method to study the reflection and transmission of obliquely incident Rayleigh waves on a vertical boundary between two welded quarter-spaces. For two media with a phase velocity ratio of 1.16 our calculation shows that the transmitted energy follows a reciprocity relation and decreases from near 100 per cent at normal incidence to 50 per cent at about 40°. The reflected energy is less than 1 per cent for angles of reflection less than 40°. When the Rayleigh wave impinges upon the less rigid medium, the reflected energy decreases as the angle of incidence increases; whereas for incidence at the more rigid medium, the reflected energy decreases at first, and then it increases as the angle of incidence increases. Since boundary conditions on the free surface are not taken into account by our method, diffraction effects are ignored. The effect of neglecting the free surface requirement is difficult to quantify, but we believe that it is small since the calcualted and experimental results agree well at normal incidence.

scholarly journals Reflection and Transmission of Rayleigh Waves in a Wedge--I

1971 ◽  
Vol 24 (4) ◽  
pp. 401-414 ◽  
Author(s):  
K. Viswanathan ◽  
J. T. Kuo ◽  
E. R. Lapwood
Keyword(s):  
Rayleigh Waves ◽  
Reflection And Transmission

TRANSMISSION AND REFLECTION OF RAYLEIGH WAVES AT CORNERS

Geophysics ◽  
1958 ◽  
Vol 23 (2) ◽  
pp. 253-266 ◽  
Author(s):  
J. Cl. de Bremaecker
Keyword(s):  
Surface Wave ◽  
Rayleigh Wave ◽  
Rayleigh Waves ◽  
Body Waves ◽  
Two Dimensional ◽  
Dimensional Model ◽  
Reflection And Transmission ◽  
Two Dimensional Model ◽  
Model Seismology ◽  
Transmission And Reflection

The methods of two dimensional model seismology were used to investigate the phenomena occurring when a Rayleigh wave is incident upon a corner whose angle is comprised between 0° and 180°. The wave bends its path only for angles between 130° and 180°. For smaller angles large and abrupt variations in reflection and transmission occur; the wave travels to the extremity of the corner and never “cuts corners”; only about 50 percent of the energy of the indicent surface wave is preserved as such, the rest goes into body waves; for a 90° corner the proportion is about 23 percent in P and 26 percent in S, with sharply preferential angles of incidence. The percentages given were found for a “plate Poisson’s ratio” of 0.17.

Effect of a metallic thin film on the propagation of Rayleigh waves

1973 ◽  
Vol 44 (4) ◽  
pp. 1524-1526 ◽  
Author(s):  
Jean Pouliquen ◽  
Guy Vaesken
Keyword(s):  
Thin Film ◽  
Rayleigh Waves ◽  
Metallic Thin Film

scholarly journals Combined reflection and transmission thin-film ellipsometry: a unified linear analysis

1975 ◽  
Vol 14 (7) ◽  
pp. 1652 ◽  
Author(s):  
R. M. A. Azzam ◽  
M. Elshazly-Zaghloul ◽  
N. M. Bashara
Keyword(s):  
Thin Film ◽  
Linear Analysis ◽  
Reflection And Transmission
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