Evanescent gravitational waves

Golat, Sebastian; Lim, Eugene A.; Rodríguez-Fortuño, Francisco J.

doi:10.1103/physrevd.101.084046

Cited by 20 publications

(14 citation statements)

References 31 publications

(55 reference statements)

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“…The transverse spin appears in any paraxialto-nonparaxial transformation, even without a change in the degree of polarization. This result establishes an important connection between three-dimensional polarization in the transverse spin [103,111] and non-paraxial fields [58][59][60][61]112,113]. The origin of this phenomenon lies in the intrinsic spin-orbit interaction of light.…”

Section: Discussionsupporting

confidence: 54%

Depolarization of Light in Optical Fibers: Effects of Diffraction and Spin-Orbit Interaction

Petrov

2021

Fibers

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Polarization is measured very often to study the interaction of light and matter, so the description of the polarization of light beams is of both practical and fundamental interest. This review discusses the polarization properties of structured light in multimode graded-index optical fibers, with an emphasis on the recent advances in the area of spin-orbit interactions. The basic physical principles and properties of twisted light propagating in a graded index fiber are described: rotation of the polarization plane, Laguerre–Gauss vector beams with polarization-orbital angular momentum entanglement, splitting of degenerate modes due to spin-orbit interaction, depolarization of light beams, Berry phase and 2D and 3D degrees of polarizations, etc. Special attention is paid to analytical methods for solving the Maxwell equations of a three-component field using perturbation analysis and quantum mechanical approaches. Vector and tensor polarization degrees for the description of strongly focused light beams and their geometrical interpretation are also discussed.

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Section: Discussionsupporting

confidence: 54%

Depolarization of Light in Optical Fibers: Effects of Diffraction and Spin-Orbit Interaction

Petrov

2021

Fibers

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“…The proposed framework is verified experimentally on the example of four structured surface waves and opens up opportunities for understanding and designing the spin dynamics and topological properties of electromagnetic waves from the radiofrequency to ultraviolet spectral ranges and for applications in spin optics, topological photonics, polarization measurements, metrology, and quantum technologies. Since the energy flow density can be represented through a current density term in the Hertz potential ( SI Appendix , section VI ), the proposed description allows also extending the concepts of the dynamics of transverse spin from electromagnetic waves to fluid, acoustic, and gravitational waves ( 30 – 32 ).…”

mentioning

confidence: 99%

Transverse spin dynamics in structured electromagnetic guided waves

Shi

et al. 2021

Proc. Natl. Acad. Sci. U.S.A.

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Spin–momentum locking, a manifestation of topological properties that governs the behavior of surface states, was studied intensively in condensed-matter physics and optics, resulting in the discovery of topological insulators and related effects and their photonic counterparts. In addition to spin, optical waves may have complex structure of vector fields associated with orbital angular momentum or nonuniform intensity variations. Here, we derive a set of spin–momentum equations which describes the relationship between the spin and orbital properties of arbitrary complex electromagnetic guided modes. The predicted photonic spin dynamics is experimentally verified with four kinds of nondiffracting surface structured waves. In contrast to the one-dimensional uniform spin of a guided plane wave, a two-dimensional chiral spin swirl is observed for structured guided modes. The proposed framework opens up opportunities for designing the spin structure and topological properties of electromagnetic waves with practical importance in spin optics, topological photonics, metrology and quantum technologies and may be used to extend the spin-dynamics concepts to fluid, acoustic, and gravitational waves.

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“…[ 31 ] In addition, research into spin–orbit interactions and spin–orbit decomposition has been extended to a variety of classical waves, including acoustic, [ 55 ] fluid, [ 56 ] elastic, [ 57 ] and gravitational waves. [ 58 ] For example, longitudinal acoustic waves have a Klein–Gordon representation and there is a similar curl relationship between the momentum and iSAM. [ 32,59 ] This indicates that the idea of our theory can be extended to the classical wave field.…”

Section: Discussionmentioning

confidence: 99%

Symmetry‐Protected Photonic Chiral Spin Textures by Spin–Orbit Coupling

Shi

et al. 2021

Laser & Photonics Reviews

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Chiral spin textures are widely researched in condensed matter systems and have shown potential for use in spintronics and storage applications. Photonic counterparts of these textures are observed in various optical systems with broken inversion symmetry. Unfortunately, the resemblances are only phenomenological. This work proposes a theoretical framework based on the variational theorem to show that the photonic chiral spin textures in an optical interface originate from the system's symmetry and relativity. Analysis of the rotational symmetry in optical systems indicates that the conservation of the total angular momentum is preserved from the local variations of spin vectors. Specifically, although the integral spin momentum does not carry net energy, the local spin momentum distribution, which determines the local subluminal energy transport and minimization variation of the square of the total angular momentum, results in the chiral twisting of the local spin vectors. The findings of this study deepen the understanding of the symmetries, conservative laws, and energy transport in optical systems, reveal the similarities in the formation mechanisms and the geometries of photonic and condensed-matter chiral spin textures, and have potential applications in chiral and spin photonics.

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Evanescent gravitational waves

Cited by 20 publications

References 31 publications

Depolarization of Light in Optical Fibers: Effects of Diffraction and Spin-Orbit Interaction

Depolarization of Light in Optical Fibers: Effects of Diffraction and Spin-Orbit Interaction

Transverse spin dynamics in structured electromagnetic guided waves

Symmetry‐Protected Photonic Chiral Spin Textures by Spin–Orbit Coupling

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