Inverse Faraday effect from the orbital angular momentum of light

Karakhanyan, Vage; Eustache, Clément; Lefier, Yannick; Grosjean, Thierry

doi:10.1103/physrevb.105.045406

Cited by 18 publications

(5 citation statements)

References 72 publications

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“…Here, the OAM of plasmonic vortices might provide an additional means to affect electronic transitions. , Also, in the field of magnetoplasmonics, researchers demonstrated effects such as SPP-assisted phase control of photoinduced precession and spin layer-selective all-optical magnetic switching in a heterostructure system with SPPs . Furthermore, via a phenomenon like the inverse Faraday effect, − instead of circularly polarized phonons, plasmonic OAM could be used for controlling magnetic properties, as already demonstrated with optical vortex beams, but with an improved spatial resolution.…”

Section: Discussionmentioning

confidence: 93%

Orbital Angular Momentum in Nanoplasmonic Vortices

et al. 2023

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In the past decade, optical orbital angular momentum (OAM) has entered the field of plasmonics in the form of surface-confined vortices, generating vast interest. Here we give an overview of the field, starting with the pioneering analytic and experimental investigations of plasmonic OAM. We describe the advances leading to the study of suboptical cycle dynamics in time-resolved experiments and the investigation of angular momentum light–matter interactions through the mixing of circularly polarized light with plasmonic vortices. We describe how additional degrees of freedom can be controlled with metasurfaces and other design techniques leading to the complete spatial and temporal modularization of surface-confined OAM. We review maturing applications of plasmonic vortices, such as plasmonic tweezers for the selective trapping and rotation of microparticles and broadband multiplexing of angular momentum light beams for high-capacity optical communications. The major advances in the field, from the first observation to complete modularization, position the controlled surface-confined OAM at the forefront of light–matter science.

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Section: Discussionmentioning

confidence: 93%

Orbital Angular Momentum in Nanoplasmonic Vortices

et al. 2023

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“…In the focal plane, on a circle of radius r 2 on which an equality R(r 2 ) = T(r 2 ) holds, field ( 21) is linearly polarized because the longitudinal SAM component in (25) equals zero, S z = 0. However, considering that the vectors A and B are mutually orthogonal and form polarization ellipse axes only at certain rays tilted at angles φ = πp/(2n), p = 0, 1, 2, .…”

Section: An Azimuthally Polarized Optical Vortexmentioning

confidence: 99%

“…The results obtained in this work can be employed for nanostructuring polarizationsensitive materials [17][18][19][20][21], for magnetization and data recording based on the inverse Faraday effect [22][23][24][25], for manipulating microparticles [26][27][28] as well as in optical microscopy [29][30][31].…”

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confidence: 91%

Transverse Spin Hall Effect and Twisted Polarization Ribbons at the Sharp Focus

Kotlyar,

Kovalev,

Telegin

et al. 2024

Applied Sciences

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In this work, using a Richards-Wolf formalism, we derive explicit analytical relationships to describe vectors of the major and minor axes of polarization ellipses centered in the focal plane when focusing a cylindrical vector beam of integer order n. In these beams, the major axis of a polarization ellipse is found to lie in the focal plane, with the minor axis being perpendicular to the focal plane. This means that the polarization ellipse is perpendicular to the focal plane, with its polarization vector rotating either clockwise or anticlockwise and forming “photonic wheels”. Considering that the wave vector is also perpendicular to the focal plane, we conclude that the polarization ellipse and the wave vector are in the same plane, so that at some point these can coincide, which is uncharacteristic of transverse electromagnetic oscillations. In a cylindrical vector beam, the spin angular momentum vector lies in the focal plane, so when making a circle centered on the optical axis, at some sections, the handedness of the spin vector and circular motion are the same, being opposite elsewhere. This effect may be called an azimuthal transverse spin Hall effect, unlike the familiar longitudinal spin Hall effect found at the sharp focus. The longitudinal spin Hall effect occurs when opposite-sign longitudinal projections of the spin angular momentum vector are spatially separated in the focal plane. In this work, we show that for the latter, there are always an even number of spatially separated regions and that, when making an axis-centered circle, the major-axis vector of polarization ellipse forms a two-sided twisted surface with an even number of twists.

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“…The interaction between light and magneto-optical materials has been a subject of extensive research interest for a long time, particularly in the tightly focused small-scale range. Circular polarized beams are considered an effective tool for triggering subwavelength longitudinal magnetization through inverse Faraday effect (IFE) [12][13][14], especially in tightly focused situations.…”

Section: Introductionmentioning

confidence: 99%

Generation of a super-oscillation magnetization hotspot by reversing the electric dipole array radiation

Xiao,

Xiong,

Wang

et al. 2024

J. Opt.

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We propose an all-optical approach to realize a super-oscillatory longitudinal magnetization hotspot with about 0.1λ in a 4π focusing system using time-reversed dipole radiation and vector diffraction theory calculations. Such a magnetization behavior is induced by focal fields of opposite polarities in the central and peripheral regions based on the inverse Faraday effect (IFE). By regulating the destructive interference in the central and peripheral regions of the focal field, a super-oscillating magnetization field is generated. Moreover, two important parameters affect the size of the magnetization field are also explored. Superoscillating magnetization hotspots in the focal region can be achieved by either increasing δ or reducing dn. The achieved ultrasmall magnetization spot shows great prospects in high-density magnetic recording, magnetic resonance imaging, and magnetic sensors.

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Inverse Faraday effect from the orbital angular momentum of light

Cited by 18 publications

References 72 publications

Orbital Angular Momentum in Nanoplasmonic Vortices

Orbital Angular Momentum in Nanoplasmonic Vortices

Transverse Spin Hall Effect and Twisted Polarization Ribbons at the Sharp Focus

Generation of a super-oscillation magnetization hotspot by reversing the electric dipole array radiation

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