10 August 2001 Optical transmission spectra of Na0.4R0.6F2.2 single crystals with fluorite structure
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Abstract
Na0.4R0.6F2.2 single crystals with fluorite structure were grown by the Stockbarger method. Optical transmission spectra were recorded on the 2 mm thick samples of these crystals at room temperature in the broad spectral region (0.2 - 12 micrometer). It was found that the spectra of crystals with Dy, Ho, Er and Tm ions have the clearly defined discrete structure with a large number of absorption bands in visible, UV and nearest IR regions. The spectra become simpler on going from Dy to Yb. The spectra of crystals with Y and Lu are simplest, almost coinciding and similar to the NaF-crystal spectrum. The peculiarities of these spectra are due to the REE-ions presence in crystalline structure. All single crystals studied have the IR absorption edge at (lambda) approximately equals 12 micrometer. The spectra obtained are compared with these of other fluorides.
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Antonina P. Shtyrkova, Tatiana M. Glushkova, Marina M. Firsova, Dmitrii F. Kiselev, Elena A. Krivandina, Zinaida I. Zhmurova, "Optical transmission spectra of Na0.4R0.6F2.2 single crystals with fluorite structure", Proc. SPIE 4517, Lightmetry: Metrology, Spectroscopy, and Testing Techniques Using Light, (10 August 2001); doi: 10.1117/12.435950; https://doi.org/10.1117/12.435950
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