Feasibility of generating surface plasmon polaritons with a given orbital momentum on cylindrical waveguides using diffractive optical elements

Boris Aleksandrovich Knyazev, Oleg Eduardovich Kameshkov, Alexey Konstantinovich Nikitin, Vladimir Sergeevich Pavelyev, Yuliya Yuryevna Choporova

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Three optical systems employing diffractive optical elements to generate surface plasmon polaritons (SPP) with orbital angular momentum on axisymmetric conductors are considered. In all three systems, the incident radiation is first converted by binary spiral phase axicons into a set of plane waves converging to the optical axis. In the zone of intersection of these waves, a "twisted" Bessel beam is formed. By fitting the diameter of the first ring of the Bessel beam to the diameter of the cylindrical conductor, it is possible to generate a rotating SPP by the "end-fire coupling" method. The use of an additional lens makes it possible to convert the SPP-exciting Bessel beam into a vortex annular beam whose diameter is independent of the topological charge of the beam. In the third scheme, converging plane waves are “intercepted” by a cylindrical metal diffraction grating, which forms twisted SPPs on a cylindrical conductor connected to the grating. Examples of the possible use of the proposed systems in experiments on a terahertz free electron laser are presented.

Translated title of the contributionВозможность генерации терагерцовых и инфракрасных поверхностных плазмон-поляритонов с орбитальным угловым моментом на цилиндрических проводниках с помощью дифракционных оптических элементов
Original languageEnglish
Pages (from-to)992-1000
Number of pages9
JournalComputer Optics
Volume43
Issue number6
DOIs
Publication statusPublished - 1 Jan 2019

Keywords

  • Binary phase axicon
  • Cylindrical grating
  • Surface plasmon polariton
  • GOLD
  • METAL WIRES
  • cylindrical grating
  • BEAMS
  • binary phase axicon
  • surface plasmon polariton
  • FREE-ELECTRON LASER
  • TERAHERTZ
  • ELECTROMAGNETIC-WAVES
  • PROPAGATION

State classification of scientific and technological information

  • 29 PHYSICS

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