| Texto completo | |
| Autor(es): |
Camara, Josivanir G.
;
da Silva, Davinson M.
;
Ferretti, Stefano
;
Gentilini, Silvia
;
Conti, Claudio
;
Ghofraniha, Neda
Número total de Autores: 6
|
| Tipo de documento: | Artigo Científico |
| Fonte: | CNR '09: SECOND INTERNATIONAL WORKSHOP ON COMPOUND NUCLEAR REACTIONS AND RELATED TOPICS; v. 309, p. 2-pg., 2024-01-01. |
| Resumo | |
Random laser (RL) based on Rhodamine 6G (Rh6G) doped silica xerogel, fabricated by a conventional sol-gel (SG) synthesis, was observed around 590 nm, in a large band typical from dye RLs. Different from other previous works, where the xerogel is just impregnated or infiltrated with a dye solution, here the Rh6G was added during the SG synthesis. The obtained material was grinded using a mortar and a pestle, and the resulting powder was carefully packed in a sample holder and pumped at 532 nm using a 6 ns pulsed laser. We used spectral and images measurements to perform statistical analysis and describe experimentally the Parisi replica breaking symmetry (RSB) phenomenon in a complex system. These results show that RSB obtained from image is a promising method for RL characterization. Indeed, by calculating the RSB maps, we demonstrate that the RL emission is not a homogenous process, depending on the scattering and gain properties of different regions. (AU) | |
| Processo FAPESP: | 23/08033-7 - Aprendizagem de Máquina para a caracterização de Lasers Aleatórios e recuperação de fases |
| Beneficiário: | Davinson Mariano da Silva |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |