Spin-Direction Control of High-Order Plasmonic Vortex With Double-Ring Distributed Nanoslits

Author

Seung-Yeol Lee ; Sun-Je Kim ; Hyounghan Kwon ; Byoungho Lee

Author_Institution

Nat. Creative Res. Center for Active Plasmonics Applic. Syst., Seoul Nat. Univ., Seoul, South Korea

Volume

27

Issue

7

fYear

2015

fDate

April1, 1 2015

Firstpage

705

Lastpage

708

Abstract

A plasmonic vortex lens (PVL) consisting of circularly distributed nanoslits is proposed. It is shown that the tilted angle variance of nanoslits along the azimuthal direction gives an opportunity to add an additional orbital angular momentum (OAM) number to the plasmonic vortex. Using the double-ring nanoslit distribution, homogeneous amplitude of excited surface plasmon along the azimuthal angle is achieved. The proposed structure has advantages compared with conventional PVLs since the spin-assisted OAM number can be an arbitrary integer value, which can enable the spin-direction control of high-order plasmonic vortex.

Keywords

angular momentum; lenses; nanophotonics; optical variables control; optical vortices; plasmonics; surface plasmons; arbitrary integer value; azimuthal angle; azimuthal direction; circularly distributed nanoslits; conventional PVL; double-ring nanoslit distribution; excited surface plasmon; high-order plasmonic vortex; homogeneous amplitude; orbital angular momentum number; plasmonic vortex lens; spin-assisted OAM number; spin-direction control; tilted angle variance; Lenses; Optical distortion; Optical polarization; Optical surface waves; Optical vortices; Plasmons; Surface waves; Nanoslits; Plasmonic vortex lens; Surface plasmons; nanoslits; plasmonic vortex lens;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2015.2390217

Filename

7006677