title: Light induced conch-shaped relief in an azo-polymer film.
abstract: We have discovered that a novel chiral structured surface relief (termed 'conch'-shaped surface relief) with a height of over 1 μm can be formed in an azo-polymer film merely by employing circularly polarized optical vortex irradiation with a total angular momentum of j = ±2. The temporal evolution of the conch-shaped surface relief in the azo-polymer film was also observed. The results provide physical insight into how the angular momentum of light is transferred to a material through mass transport by cis-trans photo-isomerization. Such conch-shaped surface reliefs with chirality, in which functional chemical composites can be doped, enable new applications, such as planar chiral metamaterials, plasmonic holograms, and identification of chiral chemical composites.
authors.affiliation: Graduate School of Advanced Integration Science, Chiba University, Chiba 263-8522, Japan.
authors.forename: Mizuki
authors.initials: M
authors.lastname: Watabe
authors.affiliation: Graduate School of Advanced Integration Science, Chiba University, Chiba 263-8522, Japan.
authors.forename: Guzhaliayi
authors.initials: G
authors.lastname: Juman
authors.affiliation: Graduate School of Advanced Integration Science, Chiba University, Chiba 263-8522, Japan.
authors.forename: Katsuhiko
authors.initials: K
authors.lastname: Miyamoto
authors.affiliation: 1] Graduate School of Advanced Integration Science, Chiba University, Chiba 263-8522, Japan [2] Japan Science and Technology Agency, CREST, 5 Sanbancho, Chiyoda-ku, Tokyo 102-0075, Japan.
authors.forename: Takashige
authors.initials: T
authors.lastname: Omatsu