Super Broadband at Telecom Wavelengths From RE3+-Doped SiO2-Ta2O5 Glass Ceramics Planar Waveguides

Autor(es)

Lima, Karmel De Oliveira ; Caixeta, Fabio Jose ; De Souza, Vitor Dos Santos ; Rosa, Leonardo Sousa ; Soares, Victor Del Vecchio ; Crumo, Carolina Assuncao ; Borin, Ivana Aparecida ; Ferrari, Jefferson Luis ; Goncalves, Rogeria Rocha

• Tipo de documento: Artigo Científico
• Fonte: RONTIERS IN CHEMISTR; v. 10, p. 12-pg., 2022-07-04.

Resumo

This paper reports on the preparation of Er3+/Yb3+/Tm3+, Er3+/Yb3+/Nd3+, and Er3+/Tm3+/Nd3+ triply doped and Er3+-doped SiO2-Ta2O5 glass ceramic nanocomposites and active planar waveguides by the sol-gel process using the dip-coating technique as deposition method. The investigation of their structural, morphological, and luminescent properties using XRD, AFM, and photoluminescence analysis, are reported here. The XRD results showed the presence of L-Ta2O5 nanocrystals dispersed in the SiO2-based amorphous host for all the nanocomposites and films. The rare earth ion (RE3+) doping concentration affected both the crystallinity, and the crystallite sizes of the Ta2O5 dispersed into SiO2-Ta2O5 nanocomposites and waveguides. AFM characterization revealed crack free and smooth surface roughness and differences in viscoelasticity on the Er3+-doped SiO2-Ta2O5 films surface, which allows the identification of Ta2O5 nanocrystals on the SiO2 amorphous host. The Er3+ doped and triply doped SiO2-Ta2O5 nanocomposites displayed broad- and super broadband NIR emissions with a FWHM up to 173 nm achieved in the telecom wavelengths. The lifetime of the I-4(13/2) emitting level of the Er3+-doped SiO2-Ta2O5 waveguides is strongly dependent on Er3+ concentration and an emission quenching was negligible up to 0.81 mol%. The structural and luminescent investigations indicated that RE3+-doped SiO2-Ta2O5 glass ceramics are promising candidates for photonic applications in optical devices operating in wide wavelengths at the telecom bands. (AU)

• Processo FAPESP: 20/05319-9 - Plataformas multifuncionais a base de materiais nanoestruturados luminescentes dopados com íons lantanídeos com potencial aplicação em fotônica e teranóstica
• Beneficiário: Rogéria Rocha Gonçalves
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 17/10423-7 - Materiais nanoestruturados à base de Nb2O5 e Ta2O5 dopados com terras raras e com emissão de banda larga na região do infravermelho próximo para aplicação em Fotônica como amplificadores ópticos e conversores de energia
• Beneficiário: Fábio José Caixeta
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 18/18213-4 - Síntese de nanomateriais luminescentes multifuncionais à base de fluoretos e óxidos dopados com íons terras raras para aplicação em Teranóstica
• Beneficiário: Karmel de Oliveira Lima
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado