Abstract:
A brief review of recent studies of crystals doped with rare-earth ions performed at the Institute of Spectroscopy of the Russian Academy of Sciences (ISAN) using high-resolution wide-range optical Fourier spectroscopy is presented. The results of a study of inhomogeneous broadening and the fine structure of lines in the absorption and luminescence spectra of crystals with rare-earth ions caused by random deformations, the isotopic structure in luminescence spectra associated with matrix isotopes, and anticrossings of the crystal hyperfine levels in a magnetic field are discussed. It is shown that the hyperfine structure in luminescence spectra can be used to implement a luminescence thermometer for the region of ultra-low temperatures.
Keywords:
spectra of crystals with rare-earth ions, deformation splittings, hyperfine structure, level anticrossings, photoluminescence, high-resolution Fourier spectroscopy, luminescence cryothermometer.
Citation:
M. N. Popova, M. Diab, K. N. Boldyrev, “High-resolution spectroscopy of functional dielectrics with rare-earth ions”, UFN, 194:11 (2024), 1177–1184; Phys. Usp., 67:11 (2024), 1111–1118
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