title: Two-photon induced polymer nanomovement.
abstract: We present the first report of two-photon induced plastic surface deformation in solid polymer films. Exposure of azo polymer films, which absorb in the visible range (lambda(max) = 480 nm), to intense 920 nm irradiation leads to polarization dependent photofluidic polymer nanomovement caused by photoselective two-photon trans <-->cis isomerization. The deformations were induced by a gradient of light intensity; and strongly depend on the wavelength and the polarization direction of the incident laser light and the position of the focused spot with respect to the plane of the polymer film.
authors.affiliation: Nanophotonics Laboratory, RIKEN The Institute of Physical and Chemical Research, Wako, Saitama, Japan
authors.forename: Hidekazu
authors.initials: H
authors.lastname: Ishitobi
authors.forename: Satoru
authors.initials: S
authors.lastname: Shoji
authors.forename: Tsunemi
authors.initials: T
authors.lastname: Hiramatsu
authors.forename: Hong-Bo
authors.initials: HB
authors.lastname: Sun
authors.forename: Zouheir
authors.initials: Z
authors.lastname: Sekkat
authors.forename: Satoshi
authors.initials: S
authors.lastname: Kawata
mesh_terms: D009038:Motion; D036103:Nanotechnology / Q000379:methods*; D052898:Optical Tweezers; D017785:Photons; D011108:Polymers / Q000737:chemistry* / Q000528:radiation effects*; D011829:Radiation Dosage
chemical_list: D011108:Polymers