Spectroscopy of condensed matter

Anomalous luminescence of Sm$^{2+}$ in LaF$_3$ crystals

E. A. Radzhabov

Vinogradov Institute of Geochemistry and Analytical Chemistry, Siberian Branch, Russian Academy of Sciences

Abstract: In LaF$_3$-Sm$^{2+}$ crystals, a broadband structureless luminescence band with a maximum at about 1230 nm was detected upon excitation into the region of 4$f$–5$d$ transitions in samarium Sm$^{2+}$ ions. By close analogy with the optical spectra of red luminescence in LaF$_3$-Eu$^{2+}$, the observed luminescence was attributed to anomalous luminescence.

Keywords: luminescence, lanthanides, samarium, absorption spectra.

Received: 17.01.2025
Revised: 21.07.2025
Accepted: 12.08.2025

DOI: 10.61011/OS.2025.08.61507.7541-25

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