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Atomically thin spherical shell-shaped superscatterers based on a Bohr model.

Rujiang Li¹, Xiao Lin, Shisheng Lin

¹State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, People's Republic of China. College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China. The Electromagnetics Academy of Zhejiang University, Zhejiang University, Hangzhou 310027, People's Republic of China.

|November 19, 2015

Summary

This summary is machine-generated.

Atomically thin graphene shells enable superscattering, significantly enhancing particle scattering. This phenomenon, explained by a Bohr model, is more effective for transverse magnetic graphene plasmons than transverse electric ones.

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Area of Science:

Plasmonics
Metamaterials
Nanophotonics

Background:

Graphene monolayers offer unique properties for nanophotonics.
Subwavelength dielectric particles typically exhibit weak scattering.
Superscattering enhances the scattering cross-section of particles dramatically.

Purpose of the Study:

To investigate the use of graphene monolayers in creating superscatterers.
To explore the mechanism behind enhanced scattering in graphene-based structures.
To compare the effectiveness of transverse magnetic and transverse electric graphene plasmons for superscattering.

Main Methods:

Utilizing graphene monolayers for atomically thin, shell-shaped superscatterer designs.
Exciting the first-order resonance of transverse magnetic (TM) graphene plasmons.
Analyzing the phenomenon using a Bohr model.
Investigating transverse electric (TE) graphene plasmons for comparison.

Main Results:

Achieved a significant enhancement of the scattering cross-section by five orders of magnitude.
Demonstrated superscattering in graphene-based shell structures.
Showed that TM graphene plasmons are highly effective for superscattering.
Found that TE graphene plasmons exhibit poor field confinement, hindering superscattering.

Conclusions:

Graphene monolayers are suitable for designing effective superscatterers.
The Bohr model provides an intuitive understanding of the superscattering mechanism.
TM graphene plasmons are crucial for achieving significant scattering enhancement, unlike TE plasmons.