title: Superior photoluminescence (PL) of Pr³⁺-In, compared to Pr³⁺-Ga, selenide-chalcogenide bulk glasses and PL of optically-clad fiber.
abstract: The photoluminescent-(PL)-properties of Pr³⁺-ions in indium-containing selenide-chalcogenide bulk-glasses are found to be superior when compared with gallium-containing analogues. We observe circa doubling of mid-infrared (MIR) PL intensity from 3.5 to 6 μm for bulk glasses, pumped at 1.55 μm wavelength, and an increased excited state lifetime at 4.7 μm. PL is reported in optically-clad fiber. Ga addition is well known to enhance RE³⁺ solubility and PL behavior, and is believed to form ([RE³⁺]-Se-[Ga(III)]) in the glasses. Indium has the same outer electronic-structure as gallium for solvating the RE-ions. Moreover, indium is heavier and promotes lower phonon energy locally around the RE-ion, thereby enhancing the RE-ion PL behavior, as observed here.
authors.forename: H
authors.initials: H
authors.lastname: Sakr
authors.forename: D
authors.initials: D
authors.lastname: Furniss
authors.forename: Z
authors.initials: Z
authors.lastname: Tang
authors.forename: L
authors.initials: L
authors.lastname: Sojka
authors.forename: N A
authors.initials: NA
authors.lastname: Moneim
authors.forename: E
authors.initials: E
authors.lastname: Barney
authors.forename: S
authors.initials: S
authors.lastname: Sujecki
authors.forename: T M
authors.initials: TM
authors.lastname: Benson
authors.forename: A B
authors.initials: AB
authors.lastname: Seddon
mesh_terms: D005336:Fiber Optic Technology / Q000295:instrumentation*; D005708:Gallium / Q000032:analysis*; D005898:Glass / Q000737:chemistry*; D007204:Indium / Q000032:analysis*; D055100:Optical Fibers
chemical_list: D007204:Indium; D005708:Gallium