Refractive Parameters and Band Energy Structure of K2SO4 Crystals Doped with Copper

Potassium sulfate crystals with a copper content of 1.7% were synthesized, and the dependence of their refractive indices n i ( λ ) and birefringence Δn i ( λ ) on their dispersion was studied. It was found that the dispersion n i ( λ ) in the spectral range of 300–700 nm is normal while introductio...

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Bibliographic Details
Published in:Journal of applied spectroscopy 2020-03, Vol.87 (1), p.143-149
Main Authors: Stadnyk, V. Yo, Matviiv, R. B., Rudysh, M. Ya, Brezvin, R. S., Shchepanskyi, P. A., Andrievskii, B. V.
Format: Article
Language:English
Subjects:
Analytical Chemistry
Atomic/Molecular Structure and Spectra
Birefringence
Copper
Crystal structure
Crystals
Dispersion
Doped crystals
Forbidden bands
Impurities
Mathematical analysis
Physics
Physics and Astronomy
Potassium
Potassium sulfate
Refractivity
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Summary:Potassium sulfate crystals with a copper content of 1.7% were synthesized, and the dependence of their refractive indices n i ( λ ) and birefringence Δn i ( λ ) on their dispersion was studied. It was found that the dispersion n i ( λ ) in the spectral range of 300–700 nm is normal while introduction of the impurity leads to a decrease of ni and of the electron polarizability. The band energy structure of potassium sulfate crystal doped with 1.7% of Cu 2+ was calculated. Introduction of the impurity leads to a decrease in the forbidden band width (E g = 5.3 and 4.9 eV for pure and doped crystals respectively). The optical functions of doped potassium sulfate crystals were calculated.
ISSN:0021-9037
1573-8647
DOI:10.1007/s10812-020-00975-7