Cascaded second-order surface plasmon solitons due to intrinsic metal nonlinearity

Pavel Ginzburg*, Alexey V. Krasavin, Anatoly V. Zayats

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

33 Citations (Scopus)

Abstract

We theoretically show the existence of cascaded second-order surface plasmon solitons propagating at the interface between a metal and a linear dielectric. Non-local multipole nonlinearities originating from the free conduction electron plasma of the metal lead to strong interaction between co-propagating surface plasmon polariton beams at the fundamental and second-harmonic frequencies. Finite element numerical modelling for an effective two-dimensional medium explicitly demonstrates soliton formation, confirming the theoretical results. The non-diffractive regime of propagation has been demonstrated at a silica/silver interface for 5 lambda-wide surface plasmon polariton beams with the loss-limited propagation distance of the order of 100 mu m for the 750/1550 nm wavelength pair. Plasmon-soliton formation in phase-matched conditions has been shown to be beneficial for non-diffractive surface plasmon polariton propagation.

Original languageEnglish
Article number013031
Number of pages13
JournalNEW JOURNAL OF PHYSICS
Volume15
DOIs
Publication statusPublished - 15 Jan 2013

Keywords

  • SPATIAL SOLITARY WAVES
  • GENERATION
  • LATTICES
  • LIGHT
  • BEAMS
  • GAIN

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