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Related Experiment Video

Updated: Jul 4, 2026

Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms
08:48

Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms

Published on: September 25, 2020

Multifrequency optical invisibility cloak with layered plasmonic shells.

Andrea Alù1, Nader Engheta

  • 1Department of Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, 19104 PA, USA.

Physical Review Letters
|June 4, 2008
PubMed
Summary
This summary is machine-generated.

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Researchers propose a multilayered plasmonic shell cloak to significantly reduce particle scattering across multiple optical frequencies. This novel cloaking method enhances invisibility by minimizing object visibility simultaneously at various wavelengths.

Area of Science:

  • Optics and Photonics
  • Materials Science
  • Electromagnetism

Background:

  • Reducing the scattering cross-section of objects is crucial for applications requiring low visibility.
  • Plasmonic materials offer unique electromagnetic properties due to their frequency dispersion and negative polarizability.

Purpose of the Study:

  • To theoretically investigate the use of a multilayered plasmonic shell as an invisibility cloak.
  • To demonstrate the reduction of a particle's total scattering cross-section across multiple optical frequencies.

Main Methods:

  • Theoretical modeling of a multilayered plasmonic shell surrounding a particle.
  • Numerical simulations to analyze the scattering properties of the cloaked object.
  • Exploitation of plasmonic material properties, including frequency dispersion and negative polarizability.

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A Stable Phantom Material for Optical and Acoustic Imaging
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A Stable Phantom Material for Optical and Acoustic Imaging

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Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
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Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

Published on: November 21, 2019

Related Experiment Videos

Last Updated: Jul 4, 2026

Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms
08:48

Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms

Published on: September 25, 2020

A Stable Phantom Material for Optical and Acoustic Imaging
04:54

A Stable Phantom Material for Optical and Acoustic Imaging

Published on: June 16, 2023

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
08:01

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

Published on: November 21, 2019

Main Results:

  • The proposed multilayered plasmonic shell effectively reduces the scattering cross-section of dielectric or conducting objects.
  • Significant reduction in object visibility (several orders of magnitude) achieved simultaneously at multiple optical frequencies.
  • Demonstration of broadband cloaking capabilities through theoretical and numerical analysis.

Conclusions:

  • Multilayered plasmonic shells are a viable strategy for creating broadband invisibility cloaks.
  • This approach offers a novel method for reducing electromagnetic scattering in the optical domain.
  • The findings have potential implications for stealth technologies and optical device design.