| Full text | |
| Author(s): |
Dominguez, Christian Tolentino
[1]
;
Gomes, Anderson A. V.
[1]
;
Wetter, Niklaus U.
[2]
;
Dipold, Jessica
[2]
;
Mestre, Valdeci
[3]
;
Martins, Weliton S.
[4]
;
Jimenez-Villar, Ernesto
[1]
Total Authors: 7
|
| Affiliation: | [1] Univ Fed Paraiba, Dept Fis, BR-58051970 Joao Pessoa, PB - Brazil
[2] CNEN IPEN, Inst Pesquisas Energet & Nucl, BR-05508000 Sao Paulo - Brazil
[3] Univ Estadual Paraiba, CCEA, BR-58706560 Patos de Minas, PB - Brazil
[4] Univ Fed Rural Pernambuco, Programa Posgrad Engn Fis, Unidade Acad Cabo de Santo Agostinho, BR-54518430 Cabo De Santo Agostinho, PE - Brazil
Total Affiliations: 4
|
| Document type: | Journal article |
| Source: | Optical Materials; v. 120, OCT 2021. |
| Web of Science Citations: | 0 |
| Abstract | |
Random lasers have the potential for cheap and coherent light sources which, in the particular case of colloidal suspensions, are completely flexible and can take on any desired shape. Here, we studied random lasing in correlated colloidal systems composed by TiO2@Silica nanoparticles suspended in ethanol solutions of Rhodamine 6G. TiO2 particles with two different silica layers (thicknesses of 40 nm and 70 nm) were prepared. The Random laser performance improves when the silica shell is thicker (70 nm), which was attributed to a stronger localization of light (higher density of localized states) induced by stronger correlation in the scatterers' (TiO2@Silica) position as a consequence of a stronger and longer-range Coulomb interaction between the scatterers. Light diffraction patterns in both TiO2@Silica suspensions showed a stronger correlation in the scatterers' position, being stronger when the silica shell is thicker. (AU) | |
| FAPESP's process: | 17/05854-9 - Localization of light an avenue for manufacturing advanced photonic devices |
| Grantee: | Niklaus Ursus Wetter |
| Support Opportunities: | Research Grants - Visiting Researcher Grant - International |
| FAPESP's process: | 17/10765-5 - Highly efficient low threshold lasers in transparent and scattering media. |
| Grantee: | Niklaus Ursus Wetter |
| Support Opportunities: | Regular Research Grants |