title: Broadband conversion of visible light to near-infrared emission by Ce3+, Yb3+-codoped yttrium aluminum garnet.
abstract: 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+).
authors.affiliation: State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China.
authors.forename: Xiaofeng
authors.initials: X
authors.lastname: Liu
authors.forename: Yu
authors.initials: Y
authors.lastname: Teng
authors.forename: Yixi
authors.initials: Y
authors.lastname: Zhuang
authors.forename: Junhua
authors.initials: J
authors.lastname: Xie
authors.forename: Yanbo
authors.initials: Y
authors.lastname: Qiao
authors.forename: Guoping
authors.initials: G
authors.lastname: Dong
authors.forename: Danping
authors.initials: D
authors.lastname: Chen
authors.forename: Jianrong
authors.initials: J
authors.lastname: Qiu