Nanostructured crystals of fluorite phases Sr{sub 1-x}R{sub x}F{sub 2+x} (R are rare-earth elements) and their ordering: IV. Study of the optical transmission spectra in the 2-17-{mu}m wavelength range
Journal Article
·
· Crystallography Reports
- Russian Academy of Sciences, Shubnikov Institute of Crystallography (Russian Federation)
Transmission spectra of two-component crystals of Sr{sub 1-x}R{sub x}F{sub 2+x} (R = Y, La-Lu; 0 {<=} x {<=} 0.5) in the 1-17-{mu}m wavelength range were studied. The spectral characteristics of these crystals and of single-component crystals of MF{sub 2} (M = Ca, Sr, or Ba) and RF{sub 3} (R = La-Nd) were compared. The transmission cutoff of Sr{sub 1-x}R{sub x}F{sub 2+x} crystals is shifted to shorter wavelengths with increasing x. The same tendency is observed with the increasing atomic number R of rare-earth elements for two isoconcentration series of Sr{sub 1-x}R{sub x}F{sub 2+x} (x {approx} 0.10 and 0.28). This tendency is pronounced at large x. The transmission cutoff of Sr{sub 1-x}R{sub x}F{sub 2+x} crystals can be varied in the range of from 10.7 to 12.2 {mu}m by changing their qualitative (R) and quantitative (x) composition. Hence, these crystals can be assigned to multicomponent fluoride optical materials with controlled optical characteristics. The Sr{sub 1-x}R{sub x}F{sub 2+x} crystals, where R = Ce-Sm, were shown to be promising materials for the design of selective optical filters in the 2-10-{mu}m spectral range.
- OSTI ID:
- 22051239
- Journal Information:
- Crystallography Reports, Journal Name: Crystallography Reports Journal Issue: 1 Vol. 55; ISSN 1063-7745; ISSN CYSTE3
- Country of Publication:
- United States
- Language:
- English
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