| Texto completo | |
| Autor(es): |
Alo, Arthur
;
Barros, Leonardo W. T.
;
Nagamine, Gabriel
;
Lemus, Jonathan C.
;
Planelles, Josep
;
Movilla, Jose L.
;
Climente, Juan I.
;
Lee, Hak June
;
Bae, Wan Ki
;
Padilha, Lazaro A.
Número total de Autores: 10
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Nano Letters; v. 23, n. 15, p. 8-pg., 2023-07-28. |
| Resumo | |
Colloidal semiconductor nanomaterials present broadband,with largecross-section, two-photon absorption (2PA) spectra, which turn theminto an important platform for applications that benefit from a highnonlinear optical response. Despite that, to date, the only meansto control the magnitude of the 2PA cross-section is by changing thenanoparticle volume, as it follows a universal volume scale, independentof the material composition. As the emission spectrum is connectedutterly to the nanomaterial dimensions, for a given material, themagnitude of the nonlinear optical response is also coupled to theemission spectra. Here, we demonstrate a means to decouple both effectsby exploring the 2PA response of different types of heterostructures,tailoring the volume dependence of the 2PA cross-section due to thedifferent dependence of the density of final states on the nanoparticlevolume. By heterostructure engineering, one can obtain 1 order ofmagnitude enhancement of the 2PA cross-section with minimum emissionspectra shift. (AU) | |
| Processo FAPESP: | 18/15574-6 - Espectroscopia avançada de nanomateriais: de suspensões coloidais à partícula única |
| Beneficiário: | Lázaro Aurélio Padilha Junior |
| Modalidade de apoio: | Auxílio à Pesquisa - Jovens Pesquisadores - Fase 2 |
| Processo FAPESP: | 18/25339-4 - Dispositivos fotônicos integrados |
| Beneficiário: | Newton Cesario Frateschi |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 19/22823-5 - Processos de dois-fótons em semicondutores com confinamento quântico |
| Beneficiário: | Arthur Aló de Oliveira |
| Modalidade de apoio: | Bolsas no Brasil - Mestrado |