Study of growth, defects and thermal and spectroscopic properties of Dy:GdScO3 and Dy, Tb:GdScO3 as promising 578 nm laser crystals. Issue 40 (25th September 2018)

• Record Type: Journal Article
• Authors: Peng, Fang; Liu, Wenpeng; Luo, Jianqiao; Sun, Dunlu; Chen, Yuanzhi; Zhang, Huili; Ding, Shoujun; Zhang, Qingli
• Is Part Of: CrystEngComm. Volume 20:Issue 40(2018)
• Page Start: 6291
• Page End: 6299
• Publication Date: 2018-09-25
• Subjects: Crystals -- Periodicals; Crystal growth -- Periodicals; Crystallography -- Periodicals; Cristaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Cristallographie -- Périodiques; 548
• DOI: 10.1039/c8ce01254g
• Languages: English
• ISSNs: 1466-8033

Abstract

Abstract : Novel promising oxide candidates for 578 nm laser: Dy:GdScO3 and Dy, Tb:GdScO3 single crystals. Abstract : Single crystals of Dy:GdScO3 and Dy, Tb:GdScO3 have been successfully grown by the Czochralski method. High crystalline quality of both crystals was determined via X-ray rocking curves. Effective segregation coefficients of Dy 3+ and Tb 3+ ions in GdScO3 host were calculated to be ∼0.7 and 1.03, respectively. The large FWHMs and absorption cross-sections of Dy:GdScO3 and Dy, Tb:GdScO3 crystals at 452 nm indicate that they can be efficiently pumped by the commercial blue GaN laser diodes. Both Dy:GdScO3 and Dy, Tb:GdScO3 exhibit relatively large stimulated emission cross-sections at 578 nm and relatively long fluorescence lifetimes. In particular, Dy, Tb:GdScO3 shows an enhanced yellow emission at around 578 nm. The energy transfer between Dy 3+ and Tb 3+ ions is beneficial for realizing population inversion by depopulating the population of the lower laser level of Dy 3+ and has negligible influence on the upper laser level. Additionally, the defects and thermal properties of Dy:GdScO3 were investigated since they are very important for crystal growth and laser applications. Collectively, these results suggest that Dy:GdScO3 and Dy, Tb:GdScO3 can be regarded as promising candidates for realizing 578 nm laser output.