title: Self-trapping of optical beams through thermophoresis.
abstract: We demonstrate, theoretically and experimentally, self-trapping of optical beams in nanoparticle suspensions by virtue of thermophoresis. We use light to control the local concentration of nanoparticles, and increase their density at the center of the optical beam, thereby increasing the effective refractive index in the beam vicinity, causing the beam to self-trap.
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: Or
authors.initials: O
authors.lastname: Peleg
authors.forename: Mordechai
authors.initials: M
authors.lastname: Segev