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Related Concept Videos

Faraday Disk Dynamo01:23

Faraday Disk Dynamo

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A Faraday disk dynamo is a DC generator, producing an emf that is constant in time. It consists of a conducting disk that rotates with a constant angular velocity in the magnetic field, perpendicular to the disk's plane. The rotation of the disk causes a change in magnetic flux, which induces an emf, causing opposite charges to develop on the rim and in the center of the disk. The polarity of the induced emf can be determined by the direction of the magnetic field and the direction of the...
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Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
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Faraday's Law

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Faraday's law state that the induced emf is the negative change in the magnetic flux per unit of time. Any change in the magnetic field or change in the orientation of the area of the coil with respect to the magnetic field induces a voltage (emf). The magnetic flux measures the number of magnetic field lines through a given surface area. Magnetic flux is estimated from the integral of the dot product of the magnetic field vector and the area vector. The negative sign describes the...
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Related Experiment Video

Updated: Sep 25, 2025

Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation
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Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation

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Giant inverse Faraday effect in a plasmonic crystal ring.

G R Aizin, J Mikalopas, M Shur

    Optics Express
    |April 27, 2022
    PubMed
    Summary

    Nanoscale plasmonic rings with modulated widths generate large DC currents and magnetic fields via the inverse Faraday effect when hit by circularly polarized light. These effects are amplified in plasmonic disk and solenoid systems.

    Area of Science:

    • Condensed matter physics
    • Plasmonics
    • Electromagnetism

    Background:

    • The inverse Faraday effect converts light into a DC magnetic field.
    • Plasmonic nanostructures offer unique light-matter interactions.

    Purpose of the Study:

    • Investigate the inverse Faraday effect in nanoscale conducting rings.
    • Explore amplification of magnetic fields using plasmonic nanostructures.

    Main Methods:

    • Theoretical analysis of circularly polarized electromagnetic waves interacting with nanorings.
    • Modeling plasmon energy bands in periodically modulated rings.
    • Simulating plasmonic disks and solenoids.

    Main Results:

    • Circularly polarized waves induce DC plasmonic currents in nanorings.

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  • Modulated ring width supports plasmon energy bands, enhancing the effect.
  • Plasmonic disks and solenoids significantly amplify the generated magnetic field.

    • Conclusions:

    • Nanoscale plasmonic rings with modulated widths can generate giant inverse Faraday effects.
    • Variable-width and stacked plasmonic structures offer a route to amplify DC magnetic fields.