Growth and optical properties of Ho3+:NaGd(MoO4)2 crystal

✍ Scribed by Zujian Wang; Xiuzhi Li; Guojian Wang; Mingjun Song; Qian Wei; Guofu Wang; Xifa Long

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 388 KB
• Volume: 30
• Category: Article
• ISSN: 0925-3467
• DOI: 10.1016/j.optmat.2007.12.012

✦ Synopsis

The Ho 3+ :NaGd(MoO 4 ) 2 crystal with dimensions of U12 Â 42 mm 2 has been grown by Czochralski (CZ) method. Polarized absorption and fluorescence spectra at room temperature were investigated. The largest absorption cross-sections, corresponding to 5 I 8 ? 5 G 6 + 5 F 1 absorption bands, are 31.0 Â 10 À20 cm 2 and 23.8 Â 10 À20 cm 2 for p-and r-polarization, respectively. The strongest emission corresponding to the 5 S 2 + 5 F 4 ? 5 I 8 transition can be induced by populating any higher energy level of Ho 3+ ion. The fluorescence lifetimes at room temperature are 3.4 ls at 550 nm, 3.5 ls at 754 nm and 46.4 ls at 1193 nm, corresponding to transitions