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Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle
Published on: January 3, 2016
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Nonlinear plasmonic dispersion and coupling analysis in the symmetric graphene sheets waveguide
Xiangqian Jiang1, Haiming Yuan1, Xiudong Sun1
1Department of Physics, Harbin Institute of Technology, Harbin 150001, China.
Scientific Reports
|December 16, 2016
Summary
We investigated nonlinear graphene waveguides and found that graphene
Area of Science:
- Photonics and optical engineering
- Condensed matter physics
Background:
- Graphene's unique optical properties enable novel waveguide designs.
- Nonlinear effects in waveguides are crucial for advanced optical applications.
Purpose of the Study:
- To investigate the nonlinear dispersion and coupling properties of graphene-bounded dielectric slab waveguides.
- To reveal the mechanism of symmetry breaking in these nonlinear waveguides.
Main Methods:
- Analysis of field intensity and chemical potential effects on the dispersion relation.
- Development of a nonlinear coupled mode theory.
- Numerical simulations to validate the theoretical model.
Main Results:
- Graphene's nonlinearity significantly impacts the waveguide's dispersion relation.
- Decreasing chemical potential alters dispersion properties, leading to the disappearance of antisymmetric and asymmetric branches.
- The nonlinear coupled mode theory accurately describes dispersion variations and explains asymmetric mode occurrence.
Conclusions:
- Nonlinear graphene waveguides exhibit tunable dispersion properties.
- Symmetry breaking is a key phenomenon driven by graphene's nonlinear characteristics.
- The developed coupled mode theory provides a robust framework for understanding these effects.
