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

• The spectral properties of Cr3+:Na2Mg5(MoO4)6 crystal exhibit a broad band emission with FWHM of 192 nm and large emission cross-section.
• Crystal field analysis reveals that Cr3+ in Cr3+:Na2Mg5(MoO4)6 crystal is located at lattice site with lower crystal field strength.
• Spectral properties of Cr3+:Na2Mg5(MoO4)6 crystal demonstrate a good potential for tunable laser material.

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 ℏωℏω 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.

Emission spectra of Cr3+:Na2Mg5(MoO4)6 crystal with an excitement wavelength 650 nm at different temperature.The spectral properties of Cr3+:Na2Mg5(MoO4)6 crystal exhibit a broad band emission with FWHM of 192 nm and large emission cross-section of 1.62 × 10−19 cm2 at 914 nm. Crystal field analysis reveals that Cr3+ in Cr3+:Na2Mg5(MoO4)6 crystal is located at lattice site with lower crystal field strength. The spectral properties of Cr3+:Na2Mg5(MoO4)6 crystal demonstrate a good potential for tunable laser material.Figure optionsDownload high-quality image (113 K)Download as PowerPoint slide