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Femtosecond laser micromachining study with multiple wavelengths in CVD diamond

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Autor(es):
Nolasco, L. K. ; Couto, F. A. ; Andrade, M. B. ; Mendonca, C. R.
Número total de Autores: 4
Tipo de documento: Artigo Científico
Fonte: DIAMOND AND RELATED MATERIALS; v. 131, p. 6-pg., 2023-01-01.
Resumo

Diamond is well known for its many remarkable mechanical, thermal, electric and optical properties. Among its remarkable characteristics, it also presents interesting nonlinear optical effects, thus being a highly desired material for many photonic devices. Therefore, femtosecond laser micromachining can be used as the processing method of such devices due to its high micron/sub-micron resolution. Thus, in this paper, the incubation effect (damage threshold fluence as a function of the number of applied fs-pulses) is studied at 1030, 515 and 343 nm with 216 fs pulses using the zero damage method. By implementing the exponential defect model, the incubation parameter was determined to be (0.14 +/- 0.03) at 1030 nm, (0.3 +/- 0.1) at 515 nm, and (0.13 +/- 0.04) at 343 nm, which indicates that at 515 nm, fewer fs-pulses are necessary to reach the minimum damage fluence value. In addition, a theoretical model of the electron density formed by a single fs-pulse was used to determine the main light-absorption mechanism at 343 nm. Consequently, this work adds to the knowledge of fs-laser micromachining of CVD diamond from near IR to UV. (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: 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