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Related Concept Videos

Electromagnetic Waves in Matter01:30

Electromagnetic Waves in Matter

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Electromagnetic waves can travel in the vacuum as well as in matter. For example light, which is an electromagnetic wave, can travel through air, water, or glass.
Consider the electromagnetic wave passing through a dielectric medium. In such a case, Maxwell's equations get modified. In Ampere's law, ε0 , the dielectric permittivity of free space is replaced with ε, the permittivity of dielectric. Also, the vacuum permeability μ0 is replaced by the permeability of the medium, μ.
Furthermore,...
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Dual Nature of Electromagnetic (EM) Radiation01:10

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Electromagnetic (EM) radiation consists of electric and magnetic field components oscillating in planes perpendicular to each other and mutually perpendicular to radiation propagation through space. EM radiation can be classified as a wave, characterized by the properties of waves such as wavelength (denoted as λ) and frequency (represented by ν).
Wavelength is the distance between two consecutive peaks (the highest point) or troughs (the lowest point) in the wave. Frequency is the number of...
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Standing Waves in a Cavity01:28

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A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
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Electromagnetic Wave Equation01:24

Electromagnetic Wave Equation

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Maxwell's equations for electromagnetic fields are related to source charges, either static or moving. These fields act on a test charge, whose trajectory can thus be determined using suitable boundary conditions. The objective of electromagnetism is thus theoretically complete.
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Interaction of EM Radiation with Matter: Spectroscopy01:12

Interaction of EM Radiation with Matter: Spectroscopy

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Electromagnetic (EM) radiation can be considered an oscillating electric and magnetic field propagating through a medium that can interact with matter in its path. The electric field in the radiation can interact with electrical charges in the atoms or molecules in the matter. On the other hand, the magnetic field can interact with the magnetic field in the atomic nucleus. The study of the interaction between electromagnetic radiation and matter is termed spectroscopy. Spectroscopy is the study...
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Electromagnetic Waves01:30

Electromagnetic Waves

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James Clerk Maxwell formulated a single theory combining all the electric and magnetic effects scientists knew during that time, calling the phenomena his theory predicted “Electromagnetic waves”. He brought together all the work that had been done by brilliant physicists such as Oersted, Coulomb, Gauss, and Faraday and added his own insights to develop the overarching theory of electromagnetism. Maxwell’s equations, combined with the Lorentz force law, encompass all the laws...
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Related Experiment Video

Updated: Jan 16, 2026

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
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Progress in Electromagnetic Wave Absorption of Multifunctional Structured Metamaterials.

Zhuo Lu1, Luwei Liu1, Zhou Chen1

  • 1School of Mechanical and Power Engineering, Nanjing Tech University, Nanjing 211800, China.

Polymers
|September 27, 2025
PubMed
Summary

Multifunctional metamaterials (MF-MMs) offer advanced electromagnetic wave absorption, overcoming limitations of traditional absorbers. Future research focuses on enhancing dynamic response and environmental adaptability for broader applications.

Keywords:
broadband absorptionelectromagnetic wave absorptionimpedance matchingmechanical propertiesmultifunctional metamaterialsmultiphysics coupling

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Area of Science:

  • Materials Science
  • Electromagnetics
  • Metamaterials

Background:

  • Conventional absorbers have limitations like narrow bandwidth and poor adaptability.
  • Multifunctional metamaterials (MF-MMs) address these by integrating structure, material, and function for enhanced electromagnetic wave absorption.

Purpose of the Study:

  • To review recent advances in MF-MMs for electromagnetic wave absorption.
  • To highlight integrated structure-material-function co-design strategies.
  • To identify limitations and future research directions for MF-MMs.

Main Methods:

  • Review of integrated structure-material-function co-design strategies.
  • Focus on advances in 3D lattice architectures, composite laminates, conformal geometries, bio-inspired topologies, and metasurfaces.
  • Synergistic use of multicomponent composites for co-regulation of impedance matching and EM loss mechanisms.

Main Results:

  • 3D lattice structures improve mechanical load-bearing capacity and enable low-frequency broadband absorption.
  • Composite laminates achieve ultra-broadband coverage (1.26-40 GHz), subwavelength thickness, and high flexural strength.
  • Bio-inspired topologies offer wide-incident-angle absorption, and metasurfaces facilitate multiphysics functional integration.

Conclusions:

  • MF-MMs show significant potential for broadband stealth and multifunctional synergy.
  • Practical applications are limited by dynamic tunability, multiphysics coupling, environmental adaptability, and manufacturing challenges.
  • Future research should focus on intelligent dynamic response, multiphysics integration, and performance optimization under extreme conditions.