Add time:08/27/2019         Source:sciencedirect.com

This paper reports the high temperature top-seeded solution growth (TSSG) of large single crystals of Cr3+-doped YAl3(BO3)4 from a K2Mo3O10B2O3 flux cooled at a rate of 2–4 K per day in the temperature range 950–1060°C, using a crystal rotation rate of 4–6 rpm. Optical absorption measurements at T = 300 K reveal broad bands associated with transitions from the 4A2 ground state of Cr3+ to the 4T2 and 4T1 excited states. The doublet R lines and their one-phonon sideband are clearly resolved at room temperature in both absorption and luminescence spectra: the splitting of the R lines demonstrates the effect of the even-parity trigonal distortions of their environment on the 4A2 and 2E levels of the Cr3+ ions.

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