title: Broadband infrared light-emitting patterns in optical glass by laser-induced nanostructuring of NiO-doped alkali-gallium germanosilicates.
abstract: In this Letter, we show functionalization of NiO-doped 7.5Li(2)O·2.5Na(2)O·20Ga(2)O(3)·35SiO(2)·35GeO(2) glass by space-selective nanocrystallization via exposure to the focused beam of a pulsed copper vapor laser (510.6 and 578.2 nm) at temperature close to the glass transition point (570°C). Irradiated areas drastically change their color, caused by electronic transitions of Ni(2+) dopant ions, without any alteration of the optical quality. Importantly, irradiated regions acquire broadband infrared luminescence (centered at about 1400 nm and possessing 400 nm effective bandwidth) typical of Ni(2+) ions in crystalline environment, and by positive change of refractive index (more than 10(-3)). Spectroscopic and diffractometric data of the irradiated regions indeed resemble those previously observed in thermally nanocrystallized glass, with Ni(2+) ions embedded in γ-Ga(2)O(3) nanocrystals. The results demonstrate the possibility of laser writing nanocrystallized multifunction patterns in germanosilicate glasses for the fabrication of active integrated devices.
authors: International Laboratory of Functional Glass-Based Materials, D. Mendeleyev University of Chemical Technology of Russia, Miusskaya pl. 9, Moscow 125047, Russia.
authors: S V
authors: SV
authors: Lotarev
authors: A S
authors: AS
authors: Lipatiev
authors: N V
authors: NV
authors: Golubev
authors: E S
authors: ES
authors: Ignat'eva
authors: G E
authors: GE
authors: Malashkevich
authors: A V
authors: AV
authors: Mudryi
authors: Y S
authors: YS
authors: Priseko
authors: R
authors: R
authors: Lorenzi
authors: A
authors: A
authors: Paleari
authors: V N
authors: VN
authors: Sigaev