title: Photostimulated near-infrared persistent luminescence as a new optical read-out from Cr³⁺-doped LiGa₅O₈.
abstract: In conventional photostimulable storage phosphors, the optical information written by x-ray or ultraviolet irradiation is usually read out as a visible photostimulated luminescence (PSL) signal under the stimulation of a low-energy light with appropriate wavelength. Unlike the transient PSL, here we report a new optical read-out form, photostimulated persistent luminescence (PSPL) in the near-infrared (NIR), from a Cr(3+)-doped LiGa₅O₈ NIR persistent phosphor exhibiting a super-long NIR persistent luminescence of more than 1,000 h. An intense PSPL signal peaking at 716 nm can be repeatedly obtained in a period of more than 1,000 h when an ultraviolet-light (250-360 nm) pre-irradiated LiGa₅O₈:Cr(3+) phosphor is repeatedly stimulated with a visible light or a NIR light. The LiGa₅O₈:Cr(3+) phosphor has promising applications in optical information storage, night-vision surveillance, and in vivo bio-imaging.
authors.affiliation: College of Engineering, University of Georgia, Athens, GA 30602, USA.
authors.forename: Feng
authors.initials: F
authors.lastname: Liu
authors.forename: Wuzhao
authors.initials: W
authors.lastname: Yan
authors.forename: Yen-Jun
authors.initials: YJ
authors.lastname: Chuang
authors.forename: Zipeng
authors.initials: Z
authors.lastname: Zhen
authors.forename: Jin
authors.initials: J
authors.lastname: Xie
authors.forename: Zhengwei
authors.initials: Z
authors.lastname: Pan
mesh_terms: D002857:Chromium / Q000737:chemistry*; D005708:Gallium / Q000528:radiation effects*; D007259:Infrared Rays; D008027:Light; D018020:Lithium Compounds / Q000528:radiation effects*; D049449:Luminescence; D008163:Luminescent Measurements; D010087:Oxides / Q000528:radiation effects*; D014466:Ultraviolet Rays
chemical_list: D018020:Lithium Compounds; D010087:Oxides; D002857:Chromium; D005708:Gallium