| Texto completo | |
| Autor(es): |
Nolasco, L. K.
;
de Andrade, L. N. S.
;
Pratavieira, S.
;
Muniz, S. R.
;
Mendonca, C. R.
Número total de Autores: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Applied Surface Science; v. 713, p. 7-pg., 2025-12-15. |
| Resumo | |
Nitrogen-vacancy (NV) color centers in diamonds are highly attractive for quantum information processing, sensing and photonics applications due to their unique quantum and optical properties, including long coherence times and spin-state control at room temperature. Synthetic CVD diamonds enhance these advantages by offering exceptional control over material properties and impurities, making them a versatile platform for photonics and quantum technologies. In this work, we investigate the use of femtosecond laser to generate NV centers in diamond. Specifically, we explore the effects of varying excitation wavelengths (343, 515, and 1030 nm), pulse durations (185-1000 fs), and laser peak fluence, optimizing conditions to maximize defect generation without inducing graphitization. NV centers fabricated under these conditions exhibit a T1 of (3.2 +/- 0.3) ms and T2* of (280 +/- 50) ns, determined using ODMR with an applied magnetic field. We propose a model describing the vacancy generation dynamics, accounting for nonlinear absorption mechanisms and light-matter interaction effects. This model successfully explains the experimental data, providing insight into NV center formation mechanisms. Our findings offer guidelines for optimizing NV center fabrication in CVD diamonds and contribute to a deeper understanding of fs-laser-driven defect generation, paving the way for advanced quantum and photonic applications. (AU) | |
| Processo FAPESP: | 18/11283-7 - Fotônica não linear: espectroscopia e processamento avançado de materiais |
| Beneficiário: | Cleber Renato Mendonça |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 22/00618-3 - EMU concedido no processo 18/11283-7: Detector EDS para o microscópio eletrônico de varredura (MEV) Hitachi TM-3000 |
| Beneficiário: | Cleber Renato Mendonça |
| Modalidade de apoio: | Auxílio à Pesquisa - Programa Equipamentos Multiusuários |
| Processo FAPESP: | 13/07276-1 - CEPOF - Centro de Pesquisa em Óptica e Fotônica |
| Beneficiário: | Vanderlei Salvador Bagnato |
| Modalidade de apoio: | Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs |
| Processo FAPESP: | 20/08715-2 - Fabricação de microressonadores poliméricos com nanodiamantes para tecnologias de informação quântica |
| Beneficiário: | Filipe Assis Couto |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado Direto |