| Texto completo | |
| Autor(es): |
Marcondes, Lia Mara
;
Orives, Juliane Resges
;
Adamitez, Frederic
;
Poirier, Gael Yves
;
Cardinal, Thierry
;
Dussauze, Marc
;
Nalin, Marcelo
Número total de Autores: 7
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Journal of Non-Crystalline Solids; v. 627, p. 10-pg., 2024-01-13. |
| Resumo | |
Second order nonlinear optical properties and structural rearrangements in GeO2-Na2O-Nb2O5 glasses were achieved by thermal poling. The effects of applied voltage as well as sodium and niobium contents on nonlinear optical (NLO)-active layer were investigated. Structural rearrangements in the anodic microlayer were investigated and occur due to sodium depletion promoting variation in bridging/non-bridging oxygen ratio and formation of a more polymerized network. Quantitative analysis of second harmonic generation signals confirm the electrooptical origin of the nonlinear optical response described by the electric-field-induced second harmonic model. chi(2) susceptibility values range from 0.42 to 0.76 pm/V depending on the niobium content. Lastly, the charge compensation mechanism with increasing applied voltage was described in detail. A progressive decrease in chi(2) for higher voltages was observed due to a greater poled thickness than expected by classical electrostatic models. In this case, the compensation mechanism occurs due to structural rearrangement, redox reactions, and motion of negative charges. (AU) | |
| Processo FAPESP: | 13/07793-6 - CEPIV - Centro de Ensino, Pesquisa e Inovação em Vidros |
| Beneficiário: | Edgar Dutra Zanotto |
| Modalidade de apoio: | Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs |
| Processo FAPESP: | 19/19609-1 - Síntese e caracterização de diferentes famílias de vidros e vitro-cerâmicas (óxidos, fosfatos e fluoretos) com propriedades magnéticas |
| Beneficiário: | Juliane Resges Orives |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 21/11494-0 - Fabricação de um microdispositivos vítreos contendo nióbio e tântalo |
| Beneficiário: | Lia Mara Silva Marcondes |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado |
| Processo FAPESP: | 20/01786-1 - Óptica não-linear e magneto-óptica em vidros e vitrocerâmicas contendo nióbio e tântalo |
| Beneficiário: | Lia Mara Silva Marcondes |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |