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      Phase-matching and peak nonlinearity enhanced third-harmonic generation in graphene plasmonic coupler

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      Phase-matching and peak nonlinearity enhanced third-harmonic generation in graphene plasmonic coupler.pdf (1.374Mb)
      Author
      Wu, Tingting
      Luo, Yu
      Maier, Stefan A.
      Wei, Lei
      Date of Issue
      2019
      School
      School of Electrical and Electronic Engineering
      Research Centre
      Research Techno Plaza
      Related Organization
      CINTRA CNRS/NTU/THALES
      Version
      Published version
      Abstract
      Strong nonlinear optical effects generally require giant optical fields interacting with the nonlinear media. Doped graphene hosts electrically tunable plasmons with long lifetimes that interact strongly with light. We investigate a graphene plasmonic coupler and explore two mechanisms to pursue highly efficient third-harmonic generation (THG): (1) phase matching of graphene plasmons at fundamental- and third-harmonic frequencies and (2) peak third-order nonlinear susceptibility of doped graphene. The third-harmonic wave is mainly converted from the evanescent mode of the incident light and the THG efficiency is found to be enhanced by over 10 orders of magnitude compared with a bare monolayer graphene. The significantly enhanced nonlinear optical responses in the graphene plasmonic coupler make this configuration an ideal platform for the development of alternative frequency generators and for signal processing at midinfrared and terahertz frequencies.
      Subject
      DRNTU::Engineering::Electrical and electronic engineering
      Graphene
      Photonics
      Type
      Journal Article
      Series/Journal Title
      Physical Review Applied
      Rights
      © 2019 American Physical Society. All rights reserved. This paper was published in Physical Review Applied and is made available with permission of American Physical Society.
      Collections
      • EEE Journal Articles
      http://dx.doi.org/10.1103/PhysRevApplied.11.014049
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