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Related Concept Videos

Symmetry in Maxwell's Equations01:28

Symmetry in Maxwell's Equations

Once the fields have been calculated using Maxwell's four equations, the Lorentz force equation gives the force that the fields exert on a charged particle moving with a certain velocity. The Lorentz force equation combines the force of the electric field and of the magnetic field on the moving charge. Maxwell's equations and the Lorentz force law together encompass all the laws of electricity and magnetism. The symmetry that Maxwell introduced into his mathematical framework may not be...
Generalized Hooke's Law01:22

Generalized Hooke's Law

The generalized Hooke's Law is a broadened version of Hooke's Law, which extends to all types of stress and in every direction. Consider an isotropic material shaped into a cube subjected to multiaxial loading. In this scenario, normal stresses are exerted along the three coordinate axes. As a result of these stresses, the cubic shape deforms into a rectangular parallelepiped. Despite this deformation, the new shape maintains equal sides, and there is a normal strain in the direction of the...
Bending of Members Made of Several Materials01:11

Bending of Members Made of Several Materials

In analyzing a structural member composed of two different materials with identical cross-sectional areas, it is crucial to understand how their distinct elastic properties affect the member's response under load. The analysis involves assessing stress and strain distributions using the transformed section concept, which accounts for variations in material properties.
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Differential Form of Maxwell's Equations01:17

Differential Form of Maxwell's Equations

James Clerk Maxwell (1831–1879) was one of the significant contributors to physics in the nineteenth century. He is probably best known for having combined existing knowledge of the laws of electricity and the laws of magnetism with his insights to form a complete overarching electromagnetic theory, represented by Maxwell's equations. The four basic laws of electricity and magnetism were discovered experimentally through the work of physicists such as Oersted, Coulomb, Gauss, and Faraday.
Bending of Material: Problem Solving01:09

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In this lesson, determine the ratio of the maximum bending moments applied to two metal pipes, given that both pipes can withstand a maximum stress of 100 MPa. Both pipes have an outer radius of 1.8 cm. Pipe A has an inner radius of 1.5 cm, and Pipe B has an inner radius of 1 cm. The ratio of the maximum bending moment applied to two metallic pipes, each with a different inner and outer radius, is determined by considering their dimensions. The inner radius of the first pipe is 1.5 cm, and for...
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Characterization of Anisotropic Leaky Mode Modulators for Holovideo
09:36

Characterization of Anisotropic Leaky Mode Modulators for Holovideo

Published on: March 19, 2016

Multifunctional complementary cloak with homogeneous anisotropic material parameters.

Jin-Shuo Mei1, Qun Wu, Kuang Zhang

  • 1School of Electronics and Information Engineering, Harbin Institute of Technology, Harbin 150001, China.

Journal of the Optical Society of America. A, Optics, Image Science, and Vision
|December 4, 2012
PubMed
Summary
This summary is machine-generated.

Researchers developed a versatile cloak using homogeneous anisotropic materials. This novel cloak functions as a complementary cloak, transparency device, and illusion cloak, demonstrating potential for practical applications.

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Area of Science:

  • Electromagnetism and Optics
  • Materials Science

Background:

  • Complementary media and optical transformation are key concepts for advanced optical devices.
  • Designing cloaking devices with homogeneous materials and no singularities presents a significant challenge.

Purpose of the Study:

  • To propose and demonstrate a multifunctional complementary cloak using homogeneous anisotropic materials.
  • To investigate the cloak's capabilities as a complementary cloak, transparency device, and illusion cloak.
  • To analyze the impact of material loss on the cloak's performance.

Main Methods:

  • Theoretical design based on complementary media and optical transformation principles.
  • Full-wave simulations utilizing the finite element method (FEM) for performance validation.
  • Analysis of electromagnetic wave interaction with the proposed cloak structure.

Main Results:

  • The proposed cloak successfully exhibits multifunctional characteristics.
  • Demonstrated performance as a complementary cloak, enabling unique wave manipulation.
  • Verified functionality as a transparency device and an illusion cloak.
  • Quantified the influence of material loss on the cloaking performance.

Conclusions:

  • A novel, singularity-free multifunctional complementary cloak can be realized with homogeneous anisotropic materials.
  • The proposed cloak offers versatile applications in optics and electromagnetism.
  • Understanding the effect of loss is crucial for the practical implementation of such cloaking devices.