| Texto completo | |
| Autor(es): Mostrar menos - |
Barth, Isabel
;
Deckart, Manuel
;
Conteduca, Donato
;
Arruda, Guilherme S.
;
Hayran, Zeki
;
Pasko, Sergej
;
Krotkus, Simonas
;
Heuken, Michael
;
Monticone, Francesco
;
Krauss, Thomas F.
;
Martins, Emiliano R.
;
Wang, Yue
Número total de Autores: 12
|
| Tipo de documento: | Artigo Científico |
| Fonte: | ACS NANO; v. 18, n. 20, p. 8-pg., 2024-05-06. |
| Resumo | |
Semiconducting transition metal dichalcogenides (TMDs) have gained significant attention as a gain medium for nanolasers, owing to their unique ability to be easily placed and stacked on virtually any substrate. However, the atomically thin nature of the active material in existing TMD lasers and the limited size due to mechanical exfoliation presents a challenge, as their limited output power makes it difficult to distinguish between true laser operation and other "laser-like" phenomena. Here, we present room temperature lasing from a large-area tungsten disulfide (WS2) monolayer, grown by a wafer-scale chemical vapor deposition (CVD) technique. The monolayer is placed on a dual-resonance dielectric metasurface with a rectangular lattice designed to enhance both absorption and emission, resulting in an ultralow threshold operation (threshold well below 1 W/cm(2)). We provide a thorough study of the laser performance, paying special attention to directionality, output power, and spatial coherence. Notably, our lasers demonstrated a coherence length of over 30 mu m, which is several times greater than what has been reported for 2D material lasers so far. Our realization of a single-mode laser from a CVD-grown monolayer presents exciting opportunities for integration and the development of real-world applications. (AU) | |
| Processo FAPESP: | 21/06121-0 - Propagação de ondas eletromagnéticas em estruturas complexas |
| Beneficiário: | Ben-Hur Viana Borges |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 20/00619-4 - Metasuperfícies para imageamento e sensoriamento |
| Beneficiário: | Emiliano Rezende Martins |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 20/15940-2 - Metassuperfícies para aplicações em sensores fotônicos |
| Beneficiário: | Guilherme Simoneti de Arruda |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |