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Optical Spin Angular Momentum: Properties, Topologies, Detection and Applications.

Shucen Liu1, Xi Xie2, Peng Shi1

  • 1Nanophotonics Research Center, Institute of Microscale Optoelectronic & State Key Laboratory of Radio Frequency Heterogeneous Integration, Shenzhen University, Shenzhen 518060, China.

Nanomaterials (Basel, Switzerland)
|December 10, 2025
PubMed
Summary
This summary is machine-generated.

Optical transverse spin, perpendicular to wavevector, emerges from confined fields. This review covers theory, experiments, and applications in spin optics, impacting imaging and quantum technologies.

Keywords:
angular momentumoptical detectionoptical differential computingspin-momentum lockingtopological structuretransverse optical force

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Area of Science:

  • * Physics
  • * Optics
  • * Quantum Technologies

Background:

  • * Spin angular momentum is crucial for light-matter interactions and optical phenomena.
  • * Historically, research focused on longitudinal optical spin; recent work explores transverse optical spin.
  • * Transverse optical spin arises from confined fields and spin-orbit coupling, leading to unique topological structures.

Purpose of the Study:

  • * To review recent advances in spin optics, focusing on optical transverse spin.
  • * To detail the fundamental physics, topological structures, and characteristics of transverse spin.
  • * To explore theoretical, experimental, and application-based progress in the field.

Main Methods:

  • * Review of theoretical frameworks for spin optics and transverse spin.
  • * Analysis of experimental techniques for generating and detecting transverse spin.
  • * Examination of applications in optics imaging, topological photonics, metrology, and quantum technologies.

Main Results:

  • * Advances in understanding the generation and properties of optical transverse spin.
  • * Elucidation of topological spin structures and characteristics arising from transverse spin.
  • * Demonstrated potential for transverse spin in advanced optical applications.

Conclusions:

  • * The conceptual and theoretical framework of spin optics significantly advances understanding of optical transverse spin.
  • * Optical transverse spin has broad implications for future technologies like quantum computing and advanced imaging.
  • * Principles of optical transverse spin can be extended to other classical wave systems.