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

Seung Yeol Lee, Sun Je Kim, Hyounghan Kwon, Byoungho Lee

Research output: Contribution to journalArticlepeer-review

44 Scopus citations

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.

Original languageEnglish
Article number7006677
Pages (from-to)705-708
Number of pages4
JournalIEEE Photonics Technology Letters
Volume27
Issue number7
DOIs
StatePublished - 1 Apr 2015

Keywords

  • Nanoslits
  • Plasmonic vortex lens
  • Surface plasmons

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