title: Single-beam interface thermal lensing.
abstract: A single-beam photothermal-lensing technique to study interfaces is presented. By analysis of the reflection from a quartz-solution interface with a low-power laser in a single-beam configuration, a photothermal signal is detected. The data were fitted with a conventional thermal lens model, and the results show that the optical element formed at the interface resembles an inverted thermal lens.
authors.affiliation: Departamento de Bioquímica, Instituto de Química, Universidade de Sāo Paulo, Av. Prof. Lineu Prestes 748, Sāo Paulo 05508-940, Brazil.
authors.forename: M
authors.initials: M
authors.lastname: Gugliotti
authors.forename: M S
authors.initials: MS
authors.lastname: Baptista
authors.forename: L G
authors.initials: LG
authors.lastname: Dias
authors.forename: M J
authors.initials: MJ
authors.lastname: Politi