A novel approach from infrared to ultraviolet emission enhancement in Yb3+, Er3+:CaF2 nanofilms.
Under 978 nm excitation, we explored the infrared-to-ultraviolet upconversion properties in the nanofilms with the nanoparticles of Yb3+, Er3+ codoped calcium fluoride (CaF2:Yb3+, Er3+). The strong enhancement of ultraviolet emission was observed. The result is attributed to the optical performance characteristics of the nanostructure materials. Furthermore, a novel upconversion approach explains well the UV-enhanced emission.
Zhang
Jisen
J
Key Laboratory of Excited State Processes, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Science, Changchun 130033, PR China.
Qin
Weiping
W
Zhang
Jishuang
J
Wang
Yan
Y
Cao
Chunyan
C
Jin
Ye
Y
Wei
Guodong
G
Wang
Guofeng
G
Wang
Lili
L