Growth, spectral property and crystal field analysis of Cr3+-doped Na2Mg5(MoO4)6 crystal

Abstract This paper reports the growth and spectral properties of Cr3+:Na2Mg5(MoO4)6 crystals. The Na2Mg5(MoO4)6 crystal was grown from a flux of Na2Mo2O7 by the top seeded solution growth method. The absorption cross-sections are 0.692 × 10−19 cm2 at 507 nm and 1.151 × 10−19 cm2 at 736 nm, respectively. The emission cross-section is 1.62 × 10−19 cm2 at 914 nm with FWHM of 192 nm. Based on the absorption and emission spectra, the crystal field strength Dq, the Racah parameters B and C, effective phonon energy ℏ ω and the Huang–Rhys factor S were calculated. The spectral properties of Cr3+:Na2Mg5(MoO4)6 crystal demonstrate a good potential for tunable laser material.