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Related Experiment Videos

Full-wave simulations of electromagnetic cloaking structures.

Steven A Cummer1, Bogdan-Ioan Popa, David Schurig

  • 1Department of Electrical and Computer Engineering, Duke University, Durham, North Carolina 27708, USA. cummer@ee.duke.edu

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|October 10, 2006
PubMed
Summary

This study demonstrates that cylindrical electromagnetic cloaking structures are robust against material variations and loss. Practical, layered approximations can achieve effective cloaking, paving the way for experimental realization.

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Area of Science:

  • Electromagnetism
  • Metamaterials
  • Computational Physics

Background:

  • Theoretical electromagnetic cloaking relies on anisotropic and inhomogeneous shells.
  • Analytical and ray-tracing methods do not fully address real-world material imperfections and full-wave effects.

Purpose of the Study:

  • To investigate the performance of cylindrical cloaking structures using full-wave electromagnetic simulations.
  • To assess the impact of material perturbations and losses on cloaking effectiveness.
  • To explore simplified, experimentally feasible cloaking material designs.

Main Methods:

  • Full-wave electromagnetic simulations of cylindrical cloaking structures.
  • Analysis using ideal and physically realizable electromagnetic parameters (permittivity and permeability).

Related Experiment Videos

  • Evaluation of cloaking performance with varying material loss and layered approximations.

    • Main Results:

    • Cloaking properties show resilience to modest variations in permittivity and permeability.
    • Cloaking performance degrades gradually with increasing material loss.
    • An eight-layer approximation of the ideal continuous medium achieves effective low-reflection shielding.
    • A simplified, imperfect cloaking material effectively reproduces ideal ray bending.

    Conclusions:

    • Cylindrical electromagnetic cloaking is feasible with physically realizable materials.
    • Layered approximations offer a practical route to experimental cloaking.
    • The derived imperfect cloaking material presents a promising avenue for easier experimental realization.