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.
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
Huidan
H
Zeng
Juan
J
Song
Danping
D
Chen
Shuanglong
S
Yuan
Xiongwei
X
Jiang
Ya
Y
Cheng
Yunxia
Y
Yang
Guorong
G
Chen
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