Photonics Research, 2018, 6 (4): 04000339, Published Online: Aug. 1, 2018
Broadening and enhancing 2.7 μm emission spectra in Er/Ho co-doped oxyfluoride germanosilicate glass ceramics by imparting multiple local structures to rare earth ions
Rare-earth-doped materials Laser materials Glass and other amorphous materials Spectroscopy, infrared
Abstract
Er/Ho co-doped oxyfluoride germanosilicate glass and glass ceramics are prepared and compared. The results indicate that the glass consists of SiO 4 and GeO 4 structural units, while the network of the glass ceramics consists of SiO 4 , GeO 4 , and GeO 6 units together with NaYF 4 nanocrystals. The presence of multiple local structures in glass ceramics creates a range of dipole environments, which is beneficial to the broadening of 2.7 μm emission. Two other reasons are attributed to the broadening of 2.7 μm emission in glass ceramics: the energy-level splitting of Er 3 + and the enhancement of the Ho 3 + : I 6 5 → I 7 5 transition in NaYF 4 nanocrystals.
Qunhuo Liu, Ying Tian, Wenhua Tang, Feifei Huang, Xufeng Jing, Junjie Zhang, Shiqing Xu. Broadening and enhancing 2.7 μm emission spectra in Er/Ho co-doped oxyfluoride germanosilicate glass ceramics by imparting multiple local structures to rare earth ions[J]. Photonics Research, 2018, 6(4): 04000339.