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Related Concept Videos

Ferromagnetism01:31

Ferromagnetism

Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
Magnetic Susceptibility and Permeability01:31

Magnetic Susceptibility and Permeability

In linear magnetic materials, like paramagnets and diamagnets, magnetization is proportional to the magnetic field intensity. The constant of proportionality, a dimensionless number, is called magnetic susceptibility. The value of the susceptibility depends on the type of material.
When diamagnetic materials are placed under an external magnetic field, the moments opposite to the field are induced. Hence, the susceptibility for diamagnets has a minimal negative value of 10-5–10-6. Since...
Diamagnetism01:26

Diamagnetism

Materials consisting of paired electrons have zero net magnetic moments. However, when these materials are placed under an external magnetic field, the moments opposite to the field are induced. Such materials are called diamagnets. Diamagnetism is the response of the diamagnets when placed in an external magnetic field.
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets.
Magnetic Field Due To A Thin Straight Wire01:27

Magnetic Field Due To A Thin Straight Wire

Consider an infinitely long straight wire carrying a current I. The magnetic field at point P at a distance a from the origin can be calculated using the Biot-Savart law.
Electromagnetic Waves in Matter01:30

Electromagnetic Waves in Matter

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, the...

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Related Experiment Video

Updated: May 28, 2026

Fabricating Metamaterials Using the Fiber Drawing Method
11:57

Fabricating Metamaterials Using the Fiber Drawing Method

Published on: October 18, 2012

Optical fiber metamagnetics.

Xi Wang1, Gayatri Venugopal, Jinwei Zeng

  • 1Department of Electrical Engineering, University at Buffalo, The State University of New York, Buffalo, New York 14260, USA.

Optics Express
|October 15, 2011
PubMed
Summary
This summary is machine-generated.

Researchers developed novel fiber-coupled magnetic metamaterials. This breakthrough integrates metamaterials onto optical fibers, enabling new photonic-on-a-chip applications.

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Area of Science:

  • Optics and Photonics
  • Materials Science
  • Nanotechnology

Background:

  • Metamaterials with magnetic properties at optical frequencies have been limited to thin films on bulk substrates.
  • Previous integrations were constrained by substrate limitations, hindering miniaturization and novel applications.

Purpose of the Study:

  • To design and experimentally demonstrate fiber-coupled magnetic metamaterials.
  • To integrate metamaterials directly onto the cross-section of an optical fiber for the first time.

Main Methods:

  • Design of novel metamaterial structures compatible with optical fiber integration.
  • Experimental fabrication and characterization of the fiber-metamaterial devices.

Main Results:

  • Successful demonstration of fiber-coupled magnetic metamaterials.
  • Integration achieved on the transverse cross-section of an optical fiber.

Conclusions:

  • This fiber-metamaterial integration represents a significant advancement in photonic integration.
  • Potential applications include advanced sensing, subwavelength imaging, image processing, and biomedical technologies.