Annealing effects on optical properties of natural alexandrite

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dc.contributor.authorScalvi, RMF
dc.contributor.authorLi, M. S.
dc.contributor.authorScalvi, LVA
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2014-05-20T15:23:27Z
dc.date.available2014-05-20T15:23:27Z
dc.date.issued2003-11-05
dc.description.abstractNatural alexandrite (BeAl2O4:Cr3+) crystals are investigated as regards the effects of annealing on their optical properties. Optical absorption spectra are measured from the ultraviolet (190 nm) to the near infrared (900 nm), for a sample subjected to consecutive annealing processes, where time and temperature are varied. Besides this, luminescence spectra are simultaneously obtained for this sample, excited with a Kr+ laser source, tuned on an ultraviolet multi-line mode (337.5, 350.7 and 356.4 nm). We observe from absorption as well as from emission data that annealing mainly influences the distribution of Cr3+ and Fe3+ ions, located on sites of a mirror plane (C-s symmetry), which are responsible for the optical properties of alexandrite. The results obtained lead to the conclusion that annealing induces a modification of the population of Cr3+ on C-s sites as well as on sites located on an inversion plane (C-i). Annealing could improve the optical properties of this material, as regards its application as a tunable laser.en
dc.description.affiliationUniv Estadual Paulista, FC, Dept Fis, BR-17033360 Bauru, SP, Brazil
dc.description.affiliationUniv São Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Carlos, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, FC, Dept Fis, BR-17033360 Bauru, SP, Brazil
dc.format.extent7437-7443
dc.identifierhttp://dx.doi.org/10.1088/0953-8984/15/43/025
dc.identifier.citationJournal of Physics-condensed Matter. Bristol: Iop Publishing Ltd, v. 15, n. 43, p. 7437-7443, 2003.
dc.identifier.doi10.1088/0953-8984/15/43/025
dc.identifier.issn0953-8984
dc.identifier.lattes0492600439402115
dc.identifier.lattes7730719476451232
dc.identifier.urihttp://hdl.handle.net/11449/34235
dc.identifier.wosWOS:000186811700027
dc.language.isoeng
dc.publisherIop Publishing Ltd
dc.relation.ispartofJournal of Physics: Condensed Matter
dc.relation.ispartofjcr2.617
dc.relation.ispartofsjr0,875
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titleAnnealing effects on optical properties of natural alexandriteen
dc.typeArtigo
dcterms.licensehttp://iopscience.iop.org/page/copyright
dcterms.rightsHolderIop Publishing Ltd
unesp.author.lattes0492600439402115
unesp.author.lattes7730719476451232
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências, Baurupt
unesp.departmentFísica - FCpt

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Bauru - FC - Faculdade de Ciências