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Nonlinear control of invisibility cloaking.
Nina A Zharova1, Ilya V Shadrivov, Alexander A Zharov
1Nonlinear Physics Centre, Research School of Physics and Engineering, Australian National University, Canberra ACT 0200, Australia.
Optics Express
|July 10, 2012
Summary
We present a new method for nonlinear control of invisibility cloaking using multi-shell plasmonic nanoparticles. The scattering properties can be tuned by adjusting the incident electromagnetic radiation intensity.
Area of Science:
- Plasmonics
- Metamaterials
- Nonlinear Optics
Background:
- Invisibility cloaking aims to render objects undetectable by controlling electromagnetic wave scattering.
- Plasmonic nanoparticles offer unique light-matter interaction properties.
- Nonlinear optical responses in materials can be exploited for dynamic control.
Purpose of the Study:
- To introduce and investigate the concept of nonlinear control for invisibility cloaking.
- To explore the scattering properties of multi-shell plasmonic nanoparticles with a nonlinear component.
Main Methods:
- Theoretical study of multi-shell plasmonic nanoparticles.
- Analysis of scattering cross-section under varying incident electromagnetic radiation power.
- Investigation of nonlinear optical response in one shell of the nanoparticle.
Main Results:
- Demonstrated control over the scattering cross-section of plasmonic nanoparticles.
- Showcased the ability to increase or decrease scattering by tuning incident radiation intensity.
- Achieved efficient control of scattering and demonstrated radiation direction reversal.
Conclusions:
- Nonlinear control offers a novel pathway for dynamic invisibility cloaking.
- Multi-shell plasmonic nanoparticles with nonlinear shells are promising for tunable cloaking applications.
- The intensity of incident electromagnetic radiation is a key parameter for controlling scattering properties.
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