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Related Experiment Video

Updated: Jun 11, 2026

Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
07:39

Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons

Published on: July 21, 2018

Structured light for focusing surface plasmon polaritons.

Z J Hu1, P S Tan, S W Zhu

  • 1Institute of Modern Optics, Key Laboratory of Optoelectronic Information Science & Technology, Ministry of Education of China, Nankai University, Tianjin 300071, People's Republic of China.

Optics Express
|July 1, 2010
PubMed
Summary
This summary is machine-generated.

We demonstrate a structureless method to focus surface plasmon polaritons (SPPs) using structured light. This technique creates sub-diffraction limit focal spots without metal structures, enabling reconfigurable SPP generation.

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Last Updated: Jun 11, 2026

Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
07:39

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Published on: July 21, 2018

Surface Enhanced Raman Spectroscopy Detection of Biomolecules Using EBL Fabricated Nanostructured Substrates
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Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

Published on: November 21, 2019

Area of Science:

  • Optics and Photonics
  • Plasmonics
  • Nanophotonics

Background:

  • Surface plasmon polaritons (SPPs) are crucial for nanoscale light manipulation.
  • Focusing SPPs typically requires intricate metal nanostructures.
  • Controlling SPP propagation and focusing offers pathways to advanced optical devices.

Purpose of the Study:

  • To propose a novel structureless method for focusing SPPs.
  • To demonstrate the generation of sub-diffraction limit focal spots.
  • To enable reconfigurable patterning of SPP distributions.

Main Methods:

  • Illumination of a flat metal film with radially polarized, cogwheel-like structured light beams.
  • Induction and propagation of SPPs without pre-fabricated metal structures.
  • Utilizing radial polarization for controlled SPP generation and focusing.

Main Results:

  • Achieved symmetric focal spots with dimensions beyond the diffraction limit.
  • Demonstrated the ability to pattern various center-symmetric evanescent distributions.
  • SPPs were observed to propagate and focus in radial directions.

Conclusions:

  • A structureless approach for SPP focusing has been successfully proposed and demonstrated.
  • The method offers reconfigurable control over SPP generation and focusing patterns.
  • This technique advances the field of plasmonics by simplifying SPP manipulation.