Enhanced green upconversion emission of Er(3+) through energy transfer by Dy(3+) under 800 nm femtosecond-laser excitation.
Er(3+) green upconversion (UC) emission corresponding to the transition of (4)S(3/2) ((2)H(11/2))-->(4)I(15/2) is enhanced in a Er/Dy-codoped LiNbO(3) crystal compared with Er-doped LiNbO(3) under 800 nm femtosecond-laser excitation at room temperature. The upconversion mechanisms are proposed based on spectral, kinetic, and pump-power dependence analyses. The energy-transfer efficiency from Dy(3+)((4)F(9/2)) to Er(3+)((4)F(7/2)) is 33%, which results in the enhancement of green UC emission. This energy transfer is advantageous for the Er(3+) UC emission sensitized by Dy(3+), especially in a low-phonon-energy host matrix.
Li
Ai-Hua
AH
Center for Condensed Matter Science and Technology, Department of Physics, Harbin Institute of Technology, Harbin, China.
Lü
Qiang
Q
Zheng
Zhi-Ren
ZR
Sun
Liang
L
Wu
Wen-Zhi
WZ
Liu
Wei-Long
WL
Chen
Heng-Zhi
HZ
Yang
Yan-Qiang
YQ
Lü
Tian-Quan
TQ
D004553:Electric Conductivity; D004867:Equipment Design; D007477:Ions; D007834:Lasers; D054023:Lasers, Semiconductor; D008674:Metals, Rare Earth; D015233:Models, Statistical; D055095:Optics and Photonics; D013696:Temperature; D013997:Time Factors
D007477:Ions; D008674:Metals, Rare Earth