title: The still unknown azobenzene - wavelength dependent photoanisotropy in amorphous azobenzene polymers.
abstract: We demonstrate a new type of anisotropy in thin films of amorphous azobenzene polymers induced between 570 and 633 nm, where the absorbance in the film is on the order of 0.05. The anisotropy has a pronounced radial contribution. This observation points to an additional mechanism for the alignment of azobenzene molecules.
authors: Department of Photonics Engineering, Technical University of Denmark, DK-4000 Roskilde, Denmark. psra@fotonik.dtu.dk
authors: P S
authors: PS
authors: Ramanujam
authors: Ole Bjarlin
authors: OB
authors: Jensen
authors: Peter
authors: P
authors: Tidemand-Lichtenberg
mesh_terms: D000042:Absorption; D016880:Anisotropy; D001391:Azo Compounds / Q000737:chemistry* / Q000528:radiation effects; D008027:Light; D008422:Materials Testing; D011108:Polymers / Q000737:chemistry* / Q000528:radiation effects; D012031:Refractometry / Q000379:methods*
chemical_list: D001391:Azo Compounds; D011108:Polymers; C009850:azobenzene