title: Bulk photochromism in a tungstate-phosphate glass: a new optical memory material?
abstract: In this work, we present a new photochromic tungstate based glass which have both absorption coefficient and refractive index modified under laser exposure. The photosensitive effect is superficial under ultraviolet (UV) irradiation but occurs in the entire volume of the glass under visible irradiation. The effect can be obtained in any specific point inside the volume using an infrared femtosecond laser. In addition, the photosensitive phenomenon can be erased by specific heat treatment. This glass can be useful to substitute actual data storage supports and is a promising material for 3-dimensional (3D) and holographic optical storage.
authors.affiliation: Departamento de Ciências Exatas, Universidade Federal de Alfenas, UNIFAL CEP 37130-000, Alfenas-MG, Brazil.
authors.forename: Gaël
authors.initials: G
authors.lastname: Poirier
authors.forename: Marcelo
authors.initials: M
authors.lastname: Nalin
authors.forename: Lucila
authors.initials: L
authors.lastname: Cescato
authors.forename: Younes
authors.initials: Y
authors.lastname: Messaddeq
authors.forename: Sidney J L
authors.initials: SJ
authors.lastname: Ribeiro
mesh_terms: D005898:Glass / Q000737:chemistry*; D055095:Optics and Photonics; D010710:Phosphates / Q000737:chemistry*; D010777:Photochemistry; D013057:Spectrum Analysis; D017973:Tungsten Compounds / Q000737:chemistry*
chemical_list: D010710:Phosphates; D017973:Tungsten Compounds; C045951:tungstate