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This article is cited in 1 scientific paper (total in 1 paper)
Physical optics
On isotropic states in doped K$_{2}$SO$_{4}$ crystals
V. I. Stadnika, R. B. Matviiva, R. S. Brezvina, P. A. Shchepanskyiab, Z. A. Kogutc a Ivan Franko National University of L'viv
b J. Dlugosh University in Czestochowa, Czestochowa, Poland
c Lviv Polytechnic National University
Abstract:
The temperature, spectral and pressure dependences of the birefringence $\Delta n_{i}$ of potassium sulfate crystals doped with 1.7% of copper have been studied. The introduction of the impurity is found to change the absolute value of $\Delta n_i$ and lead to an increase in the temperature dependence of $\Delta n_{i}(T)$. It is shown that the isotropic points appear in the doped crystal of potassium sulfate, and are shifted, compared with a pure crystal, towards low temperatures by 5 K and 11 K, respectively. It was established, that uniaxial stresses change the magnitude of the $\Delta n_{i}$ absolute values, as well as the region of existence of the isotropic state. Generalized temperature-spectral-baric diagrams of the isotropic state of doped potassium sulfate crystal are constructed, making it possible to use them as a crystal-optical sensor.
Keywords:
birefringence, isotropic point, dispersion, uniaxial pressures, diagrams, crystal-optics sensors.
Received: 08.04.2020 Revised: 19.10.2020 Accepted: 30.10.2020
Citation:
V. I. Stadnik, R. B. Matviiv, R. S. Brezvin, P. A. Shchepanskyi, Z. A. Kogut, “On isotropic states in doped K$_{2}$SO$_{4}$ crystals”, Optics and Spectroscopy, 129:2 (2021), 189–195; Optics and Spectroscopy, 129:2 (2021), 227–233
Linking options:
https://www.mathnet.ru/eng/os190 https://www.mathnet.ru/eng/os/v129/i2/p189
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