Fundamental absorption edge and normal dispersion of β -LiNaSO 4 single crystal

2016 ◽  
Vol 99 ◽  
pp. 11-18 ◽  
Author(s):  
A.M. Abdulwahab
Keyword(s):  
Single Crystal ◽  
Absorption Edge ◽  
Fundamental Absorption Edge ◽  
Normal Dispersion

Effect of Redistribution of the Optical Spectral Weight in CuO Nanostructured Ceramics

2010 ◽  
Vol 168-169 ◽  
pp. 285-288
Author(s):  
A.A. Makhnev ◽  
L.V. Nomerovannaya ◽  
Boris A. Gizhevskii ◽  
Sergey V. Naumov ◽  
Natalia V. Kostromitina
Keyword(s):  
Single Crystal ◽  
Absorption Edge ◽  
High Pressure Torsion ◽  
Cupric Oxide ◽  
Measurement Data ◽  
Fundamental Absorption Edge ◽  
Spectral Weight ◽  
Low Energy ◽  
Crystal Dispersion ◽  
Nanostructured Ceramics

Features of the optical properties of nanostructured samples of cupric oxide CuO prepared by shock wave loading (SWL) and by high pressure torsion (HPT) methods have been investigated by means of spectroscopic ellipsometry in the range of 0.5-5.0 eV. The results for nanostructured samples are discussed in comparison with the measurement data of the CuO single crystal. Dispersion of the components of the complex permittivity in nanostructured CuO samples is significantly different from that for the single crystal. The optical spectral density of the nanostructured CuO is redistributed from the energy region above the fundamental absorption edge to the region below the edge. The shift is unexpected strong for samples prepared by the HPT method. The intensity of the optical spectra is suppressed in the range above the fundamental absorption edge and increases in low-energy one. It has been shown that the energy positions of the main electronic transitions in nanostructured samples on the whole are the same as in the single crystal; at the same time, intensity of the low-energy transitions increases. The possible causes of this increase and resolution of the fine absorption structure of the nanostructured CuO are discussed.

The fundamental absorption edge in single-crystal proustite Ag3AsS3

1989 ◽  
Vol 1 (9) ◽  
pp. 1663-1672 ◽  
Author(s):  
S R Yang ◽  
K N R Taylor ◽  
F Y Zhang
Keyword(s):  
Single Crystal ◽  
Absorption Edge ◽  
Fundamental Absorption Edge

Influence of electron irradiation on the fundamental absorption edge of a copper monoxide CuO single crystal

1998 ◽  
Vol 24 (2) ◽  
pp. 127-129
Author(s):  
Yu. P. Sukhorukov ◽  
N. N. Loshkareva ◽  
A. S. Moskvin ◽  
V. L. Arbuzov ◽  
S. V. Naumov
Keyword(s):  
Single Crystal ◽  
Electron Irradiation ◽  
Absorption Edge ◽  
Fundamental Absorption Edge

Optical Constants of GaSe at the Fundamental Absorption Edge

1977 ◽  
Vol 81 (2) ◽  
pp. 665-670 ◽  
Author(s):  
G. Antonioli ◽  
D. Bianchi ◽  
V. Canevari ◽  
U. Emiliani ◽  
P. Podini
Keyword(s):  
Absorption Edge ◽  
Optical Constants ◽  
Fundamental Absorption Edge
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