Open AccessNanoscale chiral surface relief of azo-polymers with nearfield OAM light
Author(s) -
Keigo Masuda,
Ryo Shinozaki,
Yoshinori Kinezuka,
Junhyung Lee,
Seigo Ohno,
Shun Hashiyada,
Hiromi Okamoto,
Daisuke Sakai,
Kenji Harada,
Katsuhiko Miyamoto,
Takashige Omatsu
Publication year - 2018
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.022197
Subject(s) - nanoscopic scale , microscale chemistry , optical vortex , optics , materials science , wavelength , polymer , angular momentum , vortex , optoelectronics , nanotechnology , physics , classical mechanics , composite material , beam (structure) , mathematics education , mathematics , thermodynamics
An optical vortex with orbital angular momentum (OAM) can be used to induce microscale chiral structures in various materials. Such chiral structures enable the generation of a nearfield vortex, i.e. nearfield OAM light on a sub-wavelength scale, thereby leading to further nanoscale mass-transport. We report on the formation of a nanoscale chiral surface relief in azo-polymers due to nearfield OAM light. The resulting nanoscale chiral relief exhibits a diameter of ca. 400 nm, which corresponds to less than 1/5-1/6th of the original chiral structure (ca. 2.1 µm). Such a nanoscale chiral surface relief is established by the simple irradiation of uniform visible plane-wave light with an intensity of <500 mW/cm 2 .