NIR luminescence from Sol-Gel Er3+ doped SiO2:GeO2 transparent gels, nanostructured powders and thin films for photonic applications

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dc.creatorMaia, Lauro June Queiroz
dc.creatorGonçalves, Rogéria Rocha
dc.creatorGomes, Anderson Stevens Leonidas
dc.creatorRibeiro, Sidney José Lima
dc.date.accessioned2018-07-23T13:35:27Z
dc.date.available2018-07-23T13:35:27Z
dc.date.issued2015
dc.description.abstractSamples of (1 – x)SiO2:xGeO2 compositions, containing x = 10 and 20, and doped with Er3+, were prepared by a simple sol-gel route. Homogeneous and transparent gels were synthesized and xerogels were obtained by gel annealing from 700 ºC to 1100 ºC. Films exhibiting high transmittance in the visible and near infrared were deposited by spin-coating technique using the colloidal precursors. The materials were characterized structurally and microstructurally by some techniques. Spherical completely amorphous and tetragonal GeO2 nanocrystals from 3.7 nm to 25.0 nm in diameter embedded in silica-rich amorphous phase materials were obtained. The optical properties were studied by transmission spectra from ultraviolet to near infrared region, photoluminescence measurements in the infrared region, and the average lifetime of the metastable state 4I13/2 of Er3+ ions were determined. The 1 mol% Er3+ doped host with x = 20 have an infrared emission 4.9 times higher than the compound containing x = 10, and the Er3+ 4I13/2 level present lifetime between 15.0 ms and 7.5 ms. The optical band gap and refractive index values were determined, as well as the Sellmeier parameters. Finally, rib channel waveguides using femtosecond laser etching technique on silica substrates were obtained with width of 15 mm. The 1 mol% Er3+ doped 80SiO2:20GeO2 compounds can be applicable in integrated optical systems.pt_BR
dc.identifier.citationMAIA, Lauro J. Q.; GONÇALVES, Rogéria R.; GOMES, Anderson S. L.; RIBEIRO, Sidney J. L. NIR luminescence from Sol-Gel Er3+ doped SiO2:GeO2 transparent gels, nanostructured powders and thin films for photonic applications. Journal of the Brazilian Chemical Society, Campinas, v. 26, n. 12, p. 2545-2557, 2015.pt_BR
dc.identifier.doi10.5935/0103-5053.20150225
dc.identifier.issne- 1678-4790
dc.identifier.urihttp://repositorio.bc.ufg.br/handle/ri/15465
dc.language.isoengpt_BR
dc.publisher.countryBrasilpt_BR
dc.publisher.departmentInstituto de Física - IF (RG)pt_BR
dc.rightsAcesso Abertopt_BR
dc.subjectEr-doped SiO2:GeO2pt_BR
dc.subjectSimple sol-gel routept_BR
dc.subjectNanocompositept_BR
dc.subjectOptical and structural propertiespt_BR
dc.subjectOptical waveguidept_BR
dc.titleNIR luminescence from Sol-Gel Er3+ doped SiO2:GeO2 transparent gels, nanostructured powders and thin films for photonic applicationspt_BR
dc.typeArtigopt_BR

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