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Plasmonic spin induced Imbert-Fedorov shift.

Hao You1, Abdullah Alturki2, Xiaodong Zeng1

  • 1Department of Physics, Shanghai University, Shanghai 200444, China.

Nanophotonics (Berlin, Germany)
|December 5, 2024
PubMed
Summary
This summary is machine-generated.

Surface plasmon polaritons on chiral materials possess unique longitudinal spin, leading to significant Imbert-Fedorov shifts in reflected light beams due to spin-orbit coupling.

Keywords:
Imbert–Fedorov shiftlongitudinal plasmonic spinspin–orbit couplingsurface plasmon polaritons on chiral material interfaces

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Area of Science:

  • * Photonics and Plasmonics
  • * Quantum Electrodynamics (QED)

Background:

  • * Traditional surface plasmon polaritons (SPPs) exhibit transverse spin.
  • * Chiral materials introduce unique properties to SPP behavior.

Purpose of the Study:

  • * Investigate the spin angular momentum of SPPs on chiral interfaces.
  • * Analyze Imbert-Fedorov shifts in light beams interacting with these SPPs.
  • * Explore photonic spin-orbit coupling in plasmonic systems.

Main Methods:

  • * Theoretical investigation of SPPs on chiral material interfaces.
  • * Analysis of light beam reflection and transmission through a layered structure (chiral material, prisms, metal).
  • * Modeling of spin-orbit coupling effects on reflected and transmitted beams.

Main Results:

  • * SPPs on chiral interfaces exhibit both transverse and longitudinal spin components.
  • * Incident light beams interacting with these SPPs show large Imbert-Fedorov shifts.
  • * These shifts are directly influenced by the SPP's longitudinal spin and excitation coefficient.

Conclusions:

  • * Chiral materials enable novel SPP spin properties, including longitudinal spin.
  • * Observed Imbert-Fedorov shifts demonstrate significant photonic spin-orbit coupling.
  • * The study provides a platform for investigating plasmonic spin and its applications.