[14p-413-1~12] Recent progress of Nano-Material Optical-Manipulation

[14p-413-7] Plasmonic Manipulation with Nano-Vortex Fields

〇Keiji Sasaki¹, Masaki Ide¹, Shutaro Ishida¹ (1.Hokkaido Univ.)

Keywords:optical manipulation, plasmonics, nano-photonics

We demonstrate the capability of forming single-nanometer-sized optical vortex fields using designed plasmonic nanostructures. The orbital and spin angular momenta provided by a Laguerre-Gaussian beam are transferred to localized plasmons of a metal structure and confined into a nano-gap of the plasmonic multimer. Theoretical analyses and experimental results show that the nano-sized chiral field can induce optical torque, which leads to orbital rotational flow of nanoparticles in nano-space.