Comparative spectroscopic investigation of Dy³⁺ ions in different sesquioxide solid solution ceramics

Abstract

A comparative study of the spectroscopic properties of LuScO3:Dy, LuYO3:Dy, and YScO3:Dy was conducted to evaluate their application prospects in yellow laser generation. The absorption cross sections of Dy‐doped LuScO3, LuYO3, and YScO3 at 446 nm were calculated to be 0.67, 1.51, and 1.05 × 10−21 cm2, respectively. The Judd–Ofelt (J–O) theory was used to determine the J–O parameters as well as the spontaneous transition probability and fluorescence branching ratios. The fluorescence spectra of LuScO3:Dy, LuYO3:Dy, and YScO3:Dy were dominated by yellow emission corresponding to the 4F9/2 → 6H13/2 transition, with cross sections of 0.78, 1.10, and 0.76 × 10−20 cm2, respectively. The Inokuti–Hirayama model was applied to fit the non‐exponential decay curve of Dy‐doped sesquioxide solid solution ceramics in order to investigate the process of energy transfer. The impact of bond length and distortion degree on spectral properties and energy‐transfer parameters was investigated. It was concluded that among Dy‐doped sesquioxide solid solutions, LuYO3:Dy ceramics are the most promising materials for generating yellow lasers.

Positive effect of deactivated ion Tb3+ and non-optical active ion Al3+ co-doping on the Dy3+: CaLaGa3O7 crystal as a promising 574 nm yellow laser crystal

“…Moreover, Dy 3+ possesses favorable absorption band around 450 nm, indicating that the yellow uorescence can be directly obtained using blue LD pumping. And this has been implemented in many materials, such as transparent ceramics, glasses and single crystals [7][8][9][10][11] . However, large number of studies have shown that the transition of Dy 3+ from 6 H 15/2 to 4 I 15/2 is a spin forbidden process, resulting in relatively weak blue absorption and yellow emission cross-sections of Dy 3+ , which greatly limits the development of Dy 3+ yellow lasers 12 .…”

Dy3+ and Tb3+ codoped mixed garnet crystals with a high-disorder structure for promising efficient InGaN laser-diode pumped yellow lasers

“…Recently, there has been considerable interest in achieving yellow lasers in a single step through the commercial blue LD pumping technique. 8,13 Among the rare earth (RE) ions investigated for this purpose, Dy 3+ has shown the most promise. [14][15][16][17] When excited at 450 nm wavelength, Dy 3+ undergoes a transition from its ground state 6 H 15/2 to an excited state 4 I 15/2 , resulting in yellow emission through the 4 F 9/2 → 6 H 13/2 transition, as depicted in Fig.…”