title: Optical control of thermocapillary effects in complex nanofluids.
abstract: We study the strong coupling of light and nanoparticle suspensions and their surface tension effect in capillaries. We show experimentally and theoretically that increasing the intensity of a narrow laser beam passing through a capillary far away from the surface results in a significant decrease in the fluid level. The underlying mechanism relies on light-induced redistribution of nanoparticles in the bulk and the surface of the fluid, facilitating continuous optical control over the surface position. The experiments manifest optical control from afar over properties of fluid surfaces.
authors.affiliation: Physics Department, Technion, Haifa 32000, Israel.
authors.forename: Yuval
authors.initials: Y
authors.lastname: Lamhot
authors.forename: Assaf
authors.initials: A
authors.lastname: Barak
authors.forename: Carmel
authors.initials: C
authors.lastname: Rotschild
authors.forename: Mordechai
authors.initials: M
authors.lastname: Segev
authors.forename: Meirav
authors.initials: M
authors.lastname: Saraf
authors.forename: Efrat
authors.initials: E
authors.lastname: Lifshitz
authors.forename: Abraham
authors.initials: A
authors.lastname: Marmur
authors.forename: Ramy
authors.initials: R
authors.lastname: El-Ganainy
authors.forename: Demetrios N
authors.initials: DN
authors.lastname: Christodoulides