Measurement of third-order nonlinearities in selected solvents as a function of the pulse width

Autor(es)

Miguez, Maria L. ; De Souza, Tiago G. B. ; Barbano, Emerson C. ; Zilio, Sergio C. ; Misoguti, Lino

• Tipo de documento: Artigo Científico
• Fonte: Optics Express; v. 25, n. 4, p. 3553-3565, FEB 20 2017.
• Citações Web of Science: 5

Resumo

We investigated the magnitude and origin of the nonlinear refraction in several solvents with the nonlinear ellipse rotation measurements as a function of the pulse duration in the range from 60fs to 2ps. Due to the presence of non-instantaneous nuclear contributions concurrently with the nearly instantaneous electronic nonlinearity, solvents present effective refractive nonlinearities that depend on the pulse duration. By proposing an empirical model where the nonlinearity grows exponentially with the pulse duration normalized to the response time, we could separate contributions from fast isotropic and slow nuclear reorientational nonlinearities. Z-scan measurements were also carried out to support our model. (AU)

• Processo FAPESP: 13/23999-3 - Medida de não linearidades refrativas de gases pelo método de rotação não linear da polarização elíptica
• Beneficiário: Lino Misoguti
• Modalidade de apoio: Auxílio à Pesquisa - Regular