Broadband conversion of visible light to near-infrared emission by Ce3+, Yb3+-codoped yttrium aluminum garnet

• Published in: Optics letters Vol. 34; no. 22; p. 3565
• Main Authors: Liu, Xiaofeng, Teng, Yu, Zhuang, Yixi, Xie, Junhua, Qiao, Yanbo, Dong, Guoping, Chen, Danping, Qiu, Jianrong
• Format: Journal Article
• Language: English
• Published: United States 15.11.2009
• DOI: 10.1364/OL.34.003565

We show that Ce(3+) can be an efficient sensitizer for Yb(3+) in the host lattice of yttrium aluminum garnet (YAG). With blue-light excitation to induce the 4f-->5d transition of Ce(3+), characteristic near-IR emission of Yb(3+) due to transition of (2)F(5/2)-->(2)F(7/2) peaking at 1030 nm is generated as a result of energy transfer from Ce(3+) to Yb(3+). The result of spectral evolution with temperature indicates that the efficiency of energy transfer is enhanced owing to thermal effect. This evidence implies that the phonon-assisted process participates in the downconversion of YAG: Ce(3+), Yb(3+).