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Related Concept Videos

Atomic Nuclei: Nuclear Spin State Overview01:03

Atomic Nuclei: Nuclear Spin State Overview

NMR-active nuclei have energy levels called 'spin states' that are associated with the orientations of their nuclear magnetic moments. In the absence of a magnetic field, the nuclear magnetic moments are randomly oriented, and the spin states are degenerate. When an external magnetic field is applied, the spin states have only 2 + 1 orientations available to them. A proton with = ½ has two available orientations. Similarly, for a quadrupolar nucleus with a nuclear spin value of one, the...
Atomic Nuclei: Nuclear Relaxation Processes01:23

Atomic Nuclei: Nuclear Relaxation Processes

In the absence of an external magnetic field, nuclear spin states are degenerate and randomly oriented. When a magnetic field is applied, the spins begin to precess and orient themselves along (lower energy) or against (higher energy) the direction of the field. At equilibrium, a slight excess population of spins exists in the lower energy state. Because the direction of the magnetic field is fixed as the z-axis,  the precessing magnetic moments are randomly oriented around the z-axis. This...
Valence Bond Theory02:42

Valence Bond Theory

Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
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.
Atomic Nuclei: Nuclear Magnetic Moment00:59

Atomic Nuclei: Nuclear Magnetic Moment

All atomic nuclei are positively charged. When they have a nonzero spin, they behave like rotating charges. As a consequence of their charge and spin, these nuclei generate a magnetic field (B). This, in turn, gives rise to a magnetic moment (μ), which is randomly oriented in the absence of an external magnetic field. When an external magnetic field (B0) is applied, the magnetic moment vectors can align with the field or against it in 2 + 1 orientations. A hydrogen nucleus, which is just a...
Atomic Nuclei: Magnetic Resonance01:05

Atomic Nuclei: Magnetic Resonance

The number of nuclear spins aligned in the lower energy state is slightly greater than those in the higher energy state. In the presence of an external magnetic field, as the spins precess at the Larmor frequency, the excess population results in a net magnetization oriented along the z axis. When a pulse or a short burst of radio waves at the Larmor frequency is applied along the x axis, the coupling of frequencies causes resonance and flips the nuclear spins of the excess population from the...

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Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
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Published on: November 21, 2019

Optical spin-orbit interaction induced by magnetic textures.

Martin Luttmann1,2, Mauro Fanciulli3,4,5, Pietro Carrara6

  • 1Université Paris-Saclay, CEA, LIDYL, Gif-sur-Yvette, 91191, France. martin.luttmann@epfl.ch.

Scientific Reports
|July 9, 2026
PubMed
Summary
This summary is machine-generated.

Orbital angular momentum (OAM) of light is explored in magneto-optics. Reflection on magnetic textures modifies OAM, offering new ways to optically read magnetization topology and shape light

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Area of Science:

  • Magneto-optics
  • Light-matter interactions
  • Photonics

Background:

  • The role of orbital angular momentum (OAM) in magneto-optics is largely unexplored.
  • Spin angular momentum (SAM) and OAM of light are coupled in non-homogeneous and non-isotropic materials.

Purpose of the Study:

  • To investigate the modification of OAM upon light reflection from magnetic textures.
  • To explore the relationship between incident SAM, magnetic texture topology, and OAM variation.

Main Methods:

  • Theoretical prediction of OAM modification.
  • Analysis of light interaction with magnetic textures (e.g., skyrmions).

Main Results:

  • OAM of photons is modified upon reflection from magnetic textures.
  • The variation in OAM depends on the incident SAM and the texture's topology.

Conclusions:

  • OAM modification upon reflection offers a new method for optically reading magnetic texture topology.
  • This phenomenon may enable novel ways to manipulate light's angular momentum using magnetism.