| Texto completo | |
| Autor(es): |
Cadore, Alisson R.
;
Ore, Alexandre S. M. V.
;
Steinberg, David
;
Zapata, Juan D.
;
de Souza, Eunezio A. T.
;
Bahamon, Dario A.
;
de Matos, Christiano J. S.
Número total de Autores: 7
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Journal of Applied Physics; v. 135, n. 8, p. 10-pg., 2024-02-28. |
| Resumo | |
Layered franckeite is a natural superlattice composed of two alternating layers of different compositions, SnS2- and PbS-like. This creates incommensurability between the two species along the planes of the layers, resulting in spontaneous symmetry-break periodic ripples in the a-axis orientation. Nevertheless, natural franckeite heterostructure has shown potential for optoelectronic applications mostly because it is a semiconductor with 0.7 eV bandgap, air-stable, and can be easily exfoliated down to ultrathin thicknesses. Here, we demonstrate that few-layer franckeite shows a highly anisotropic nonlinear optical response due to its lattice structure, which allows for the identification of the ripple axis. Moreover, we find that the highly anisotropic third-harmonic emission strongly varies with material thickness. These features are further corroborated by a theoretical nonlinear susceptibility model and the nonlinear transfer matrix method. Overall, our findings help to understand this material and propose a characterization method that could be used in other layered materials and heterostructures to assign their characteristic axes. (c) 2024 Author(s). (AU) | |
| Processo FAPESP: | 15/11779-4 - Efeitos plasmônicos e não-lineares em grafeno acoplado a guias de onda ópticos |
| Beneficiário: | Christiano José Santiago de Matos |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 20/04374-6 - Fabricação e caracterização de guias de ondas para o infravermelho médio com matrizes de nanofitas de grafeno |
| Beneficiário: | Alisson Ronieri Cadore |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 18/25339-4 - Dispositivos fotônicos integrados |
| Beneficiário: | Newton Cesario Frateschi |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |