| Texto completo | |
| Autor(es): |
Liu, Albert
;
Nagamine, Gabriel
;
Bonato, Luiz G.
;
Almeida, Diogo B.
;
Zagonel, Luiz F.
;
Nogueira, Ana F.
;
Padilha, Lazaro A.
;
Cundiff, Steven T.
Número total de Autores: 8
|
| Tipo de documento: | Artigo Científico |
| Fonte: | ACS NANO; v. 15, n. 4, p. 8-pg., 2021-03-26. |
| Resumo | |
Perovskite nanoplatelets possess extremely narrow absorption and emission line widths, which are crucial characteristics for many optical applications. However, their underlying intrinsic and extrinsic line-broadening mechanisms are poorly understood. Here, we apply multidimensional coherent spectroscopy to determine the homogeneous line broadening of colloidal perovskite nanoplatelet ensembles. We demonstrate a dependence of not only their intrinsic line widths but also of various broadening mechanisms on platelet geometry. We find that decreasing nanoplatelet thickness by a single monolayer results in a 2-fold reduction of the inhomogeneous line width and a 3-fold reduction of the intrinsic homogeneous line width to the sub-millielectronvolts regime. In addition, our measurements suggest homogeneously broadened exciton resonances in two-layer (but not necessarily three-layer) nanoplatelets at room-temperature. (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: | 19/22576-8 - Acessando a dinâmica de estado excitado em nanoestruturas por espectroscopia coerente multidimensional |
| Beneficiário: | Diogo Burigo Almeida |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |