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Related Experiment Video

Updated: Jun 19, 2026

Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
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Enhancing angular photonic spin Hall effect at surface plasmon resonance.

Cherrie May Olaya1, Norihiko Hayazawa1,2, Maria Herminia Balgos3

  • 1Metaphotonics Research Team, RIKEN Center for Advanced Photonics, Saitama, 351-0198, Japan.

Nanophotonics (Berlin, Germany)
|September 25, 2025
PubMed
Summary
This summary is machine-generated.

We developed a new polarimetric method to directly measure the enhanced photonic spin Hall effect (PSHE) in plasmonic systems. This technique accurately separates PSHE from artifacts, enabling new spin-based nanophotonic applications.

Keywords:
Imbert–Fedorov shiftphotonic spin Hall effectspin-opticssurface plasmon resonance

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Area of Science:

  • Photonics
  • Plasmonics
  • Quantum Optics

Background:

  • The photonic spin Hall effect (PSHE) describes light's spin-dependent spatial shift due to spin-orbit interaction.
  • Direct measurement of PSHE, especially enhanced forms, is crucial for advancing spin-based photonics.
  • Existing methods often indirectly measure PSHE or struggle with separating it from other optical effects.

Purpose of the Study:

  • To demonstrate a novel polarimetric scheme for directly measuring surface plasmon resonance-enhanced angular PSHE.
  • To enhance the angular PSHE signal by focusing the incident beam.
  • To accurately extract PSHE by accounting for the Imbert-Fedorov shift.

Main Methods:

  • Utilized a polarimetric scheme in the Kretschmann configuration with a gold film.
  • Employed a focused incident beam to achieve a small beam waist and enhance angular PSHE.
  • Separated PSHE from polarization-induced artifacts by accounting for the Imbert-Fedorov shift.

Main Results:

  • Successfully demonstrated direct measurement of surface plasmon resonance-enhanced angular PSHE.
  • Significantly enhanced the angular PSHE signal compared to weak measurement schemes.
  • Achieved accurate separation of PSHE from artifacts by considering the Imbert-Fedorov shift.

Conclusions:

  • The developed method enables direct and accurate measurement of enhanced PSHE.
  • This provides an additional spin degree of freedom for light manipulation.
  • Opens avenues for innovative spin-controlled nanophotonic applications like optical sensing and precision metrology.