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Updated: Jun 24, 2026

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
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Spatial filtering by using cascading plasmonic gratings.

Chih-Ming Wang1, Yia-Chung Chang, Din Ping Tsai

  • 1Institute of Opto-electronic Engineering, National Dong Hwa University, Hualien, Taiwan 97401, ROC. wangcm@mail.ndhu.edu.tw

Optics Express
|April 15, 2009
PubMed
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This study investigates a novel plasmonic multilayer structure. The structure exhibits a sharp resonance peak, showing potential for spatial filtering and enhancing light source coherence.

Area of Science:

  • Photonics and Plasmonics
  • Optical Engineering

Background:

  • Surface plasmon resonance (SPR) is crucial for sensing and optical devices.
  • Metal/insulator/metal (MIM) structures offer unique plasmonic properties.
  • Cascaded gratings can manipulate light-matter interactions.

Purpose of the Study:

  • To investigate the optical properties of a novel plasmonic multilayer structure.
  • To explore the mixing of extended and localized surface plasmons.
  • To assess the potential of the structure as a spatial filter.

Main Methods:

  • Fabrication of a plasmonic multilayer structure with two longitudinally cascaded gratings.
  • Experimental investigation of angle-dependent reflection spectra.
  • Analysis of resonance peak characteristics, including full-width at half maximum (FWHM) and angular dispersion.

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Last Updated: Jun 24, 2026

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Published on: November 21, 2019

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Published on: September 5, 2017

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Main Results:

  • The structure exhibits a resonance peak in its angle-dependent reflection spectrum.
  • The resonance peak has a narrow full-width at half maximum (FWHM) of less than 3 degrees.
  • The angular dispersion was measured to be approximately 0.15 degrees/nm.

Conclusions:

  • The proposed plasmonic multilayer structure effectively mixes extended and localized surface plasmons.
  • The narrow resonance peak and specific angular dispersion suggest suitability for spatial filtering applications.
  • The structure can potentially improve the spatial coherence of light sources.