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Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle

Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle

Published on: January 3, 2016

Surface plasmons at the interface between graphene and Kerr-type nonlinear media.

Lei Wang¹, Wei Cai, Xinzheng Zhang

¹The Key Laboratory of Weak-Light Nonlinear Photonics, Ministry of Education, School of Physics and TEDA Applied Physics School, Nankai University, Tianjin 300457, China.

|June 30, 2012

Summary

This study explores graphene plasmons on nonlinear substrates. Researchers found that substrate nonlinearity can tune graphene plasmon wavelengths, offering new control over optical properties.

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Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons

Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons

Published on: July 21, 2018

Area of Science:

Optics and Photonics
Materials Science

Background:

Surface plasmons are collective electron oscillations on metal or conductive surfaces.
Graphene exhibits unique plasmonic properties due to its 2D nature and tunable conductivity.
Kerr-type nonlinear substrates exhibit a refractive index dependent on light intensity.

Purpose of the Study:

To analytically investigate the properties of surface plasmons at the graphene-nonlinear substrate interface.
To understand how substrate nonlinearity affects graphene plasmon dispersion and propagation.
To explore the tunability of graphene plasmon wavelengths via substrate nonlinear effects.

Main Methods:

Analytical investigation of surface plasmon properties.
Modeling the interaction between graphene plasmons and Kerr-type nonlinear substrates.
Analysis of dispersion relations and propagation distances.

Main Results:

The relative propagation distance of graphene plasmons is largely unaffected by substrate nonlinearity.
The dispersion of graphene plasmons is significantly influenced by the nonlinear effects of the substrate.
Graphene plasmon wavelengths can be effectively tuned by adjusting the nonlinear permittivity of the substrate.

Conclusions:

Nonlinear substrates offer a viable method for tuning graphene plasmon wavelengths.
This tunability has implications for designing advanced plasmonic devices.
Understanding these interactions is crucial for future graphene-based optoelectronics.