Three-photon-excited upconversion luminescence of niobium ions doped silicate glass by a femtosecond laser irradiation.
We report on the bluish green upconversion luminescence of niobium ions doped silicate glass by a femtosecond laser irradiation. The dependence of the fluorescence intensity on the pump power density of laser indicates that the conversion of infrared irradiation to visible emission is dominated by three-photon excitation process. We suggest that the charge transfer from O(2-) to Nb(5+) can efficiently contribute to the bluish green emission. The results indicate that transition metal ions without d electrons play an important role in fields of optics when embedded into silicate glass matrix.
Zeng
Huidan
H
Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China. hdzeng@ecust.edu.cn
Song
Juan
J
Chen
Danping
D
Yuan
Shuanglong
S
Jiang
Xiongwei
X
Cheng
Ya
Y
Yang
Yunxia
Y
Chen
Guorong
G
D005898:Glass / Q000737:chemistry* / Q000528:radiation effects*; D007834:Lasers; D049449:Luminescence; D009556:Niobium / Q000737:chemistry*; D017785:Photons; D017640:Silicates / Q000737:chemistry*; D013057:Spectrum Analysis; D013997:Time Factors
D017640:Silicates; D009556:Niobium