Discrimination between two distinct nonlinear effects by polarization-resolved Z-scan measurements

Autor(es)

Melhado, Marlon S. ^[1] ; de Souza, Tiago G. B. ^[1] ; Zilio, Sergio C. ^{[2, 1]} ; Barbano, Emerson C. ^[3] ; Misoguti, Lino ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Fis Sao Carlos, Caixal Postal 369, BR-13560970 Sao Carlos, SP - Brazil

^[2] Univ Fed Goias, Inst Fis, BR-74001970 Goiania, Go - Brazil

^[3] Univ Fed Parana, Dept Fis, BR-81531980 Curitiba, Parana - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Optics Express; v. 28, n. 3, p. 3352-3360, FEB 3 2020.
• Citações Web of Science: 2

Resumo

We investigated how the Z-scan technique can be explored to distinguish two types of nonlinear refractive effects by employing two distinct laser polarizations. It is possible that pure electronic, molecular orientation and thermal nonlinear effects may occur simultaneously during light-matter interaction. We found a way to discriminate and quantify two distinct nonlinear processes from Z-scan signals measured with linear and circular polarizations. This paper provides analytical equations for nonlinear refractions and in order to test them, we carried out measurements in CS2 and in a rhodamine-B solution, where electronic and orientational, and electronic and thermal nonlinearities mixing, respectively, are present. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement (AU)

• Processo FAPESP: 19/00638-1 - Estudo das não linearidades de semicondutores policristalinos de estrutura blenda de zinco: dependências espectral e espacial
• Beneficiário: Lino Misoguti
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• 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