TY - JOUR
T1 - Constructive spin-orbital angular momentum coupling can twist materials to create spiral structures in optical vortex illumination
AU - Barada, Daisuke
AU - Juman, Guzhaliayi
AU - Yoshida, Itsuki
AU - Miyamoto, Katsuhiko
AU - Kawata, Shigeo
AU - Ohno, Seigo
AU - Omatsu, Takashige
N1 - Funding Information:
The authors acknowledge financial support from a Grant-in-Aid for Scientific Research (No. 24360022) from the Japan Society for the Promotion of Science and a Strategic Basic Research Program (CREST) from the Japan Science and Technology Agency.
Publisher Copyright:
© 2016 AIP Publishing LLC.
PY - 2016/2/1
Y1 - 2016/2/1
N2 - It was discovered that optical vortices twist isotropic and homogenous materials, e.g., azo-polymer films to form spiral structures on a nano- or micro-scale. However, the formation mechanism has not yet been established theoretically. To understand the mechanism of the spiral surface relief formation in the azo-polymer film, we theoretically investigate the optical radiation force induced in an isotropic and homogeneous material under irradiation using a continuous-wave optical vortex with arbitrary topological charge and polarization. It is revealed that the spiral surface relief formation in azo-polymer films requires the irradiation of optical vortices with a positive (negative) spin angular momentum and a positive (negative) orbital angular momentum (constructive spin-orbital angular momentum coupling), i.e., the degeneracy among the optical vortices with the same total angular momentum is resolved.
AB - It was discovered that optical vortices twist isotropic and homogenous materials, e.g., azo-polymer films to form spiral structures on a nano- or micro-scale. However, the formation mechanism has not yet been established theoretically. To understand the mechanism of the spiral surface relief formation in the azo-polymer film, we theoretically investigate the optical radiation force induced in an isotropic and homogeneous material under irradiation using a continuous-wave optical vortex with arbitrary topological charge and polarization. It is revealed that the spiral surface relief formation in azo-polymer films requires the irradiation of optical vortices with a positive (negative) spin angular momentum and a positive (negative) orbital angular momentum (constructive spin-orbital angular momentum coupling), i.e., the degeneracy among the optical vortices with the same total angular momentum is resolved.
UR - http://www.scopus.com/inward/record.url?scp=84957071288&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84957071288&partnerID=8YFLogxK
U2 - 10.1063/1.4941023
DO - 10.1063/1.4941023
M3 - Article
AN - SCOPUS:84957071288
SN - 0003-6951
VL - 108
JO - Applied Physics Letters
JF - Applied Physics Letters
IS - 5
M1 - 051108
ER -