| Texto completo | |
| Autor(es): Mostrar menos - |
Mitra, Dipanwita
;
Fabris, Guilherme S. L.
;
Benjamim De Oliveira, Raphael
;
Sadhukhan, Riya
;
Sarkar, Jayanta Kumar
;
Ferrer, Mateus M.
;
Pereira Junior, Marcelo Lopes
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Mahapatra, Preeti Lata
;
Goswami, Dipak Kumar
;
Costin, Gelu
;
Galvao, Douglas S.
;
Tiwary, Chandra Sekhar
;
Datta, Prasanta Kumar
Número total de Autores: 13
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| Tipo de documento: | Artigo Científico |
| Fonte: | ADVANCED OPTICAL MATERIALS; v. N/A, p. 14-pg., 2026-01-19. |
| Resumo | |
Light-matter interactions in 2D materials gain significant interest due to their distinctive optical and electronic properties. Recently, silicates emerge as a promising new class of 2D materials, but their nonlinear optical properties remain largely unexplored. This study demonstrates the layer-dependent nonlinear absorption and optical limiting capabilities of 2D muscovite, a silicate mineral, using femtosecond laser excitation at 450 nm. The two-photon absorption (TPA) coefficient is highly sensitive to the number of layers, increasing markedly from (3.91 +/- 0.06) x103 cm GW-1 in multilayer structures to (6.94 +/- 0.17) x 105 cm GW-1 in the monolayer limit at a peak intensity 68 GW cm-2, highlighting a pronounced layer-dependent enhancement in nonlinear absorption. Additionally, monolayer muscovite exhibits an optical limiting threshold of 1.46 mJ cm- 2, outperforming graphene and other 2D dichalcogenides. This enhanced TPA results from quantum confinement and intrinsic lattice defects that facilitate nonlinear optical transitions. Density functional theory reveals that liquid-phase exfoliation disrupts potassium interlayers and induces oxygen vacancies, creating mid-gap electronic states that significantly enhance TPA. These insights open new avenues for designing low-fluence, high-efficiency optical limiters using 2D silicates. (AU) | |
| Processo FAPESP: | 13/08293-7 - CECC - Centro de Engenharia e Ciências Computacionais |
| Beneficiário: | Munir Salomao Skaf |
| Modalidade de apoio: | Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs |
| Processo FAPESP: | 24/03413-9 - Propriedades Estruturais, Eletrônicas e de Transporte de Nanoestruturas Baseadas nos Grafinos e Grafidinos |
| Beneficiário: | Guilherme da Silva Lopes Fabris |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 19/17874-0 - EMU concedido no Proc. 2013/08293-7, KAHUNA upgrade - HPE Apollo Gen10 Supercomputer |
| Beneficiário: | Munir Salomao Skaf |
| Modalidade de apoio: | Auxílio à Pesquisa - Programa Equipamentos Multiusuários |