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Compact Bragg grating with embedded metallic nano-structures.

Jianwei Mu1, Xun Li, Wei-Ping Huang

  • 1Department of Electrical and Computer Engineering, McMaster University, 1280 Main Street West, Hamilton,Ontario, L8S 4L8 Canada. Muj2@mcmaster.ca

Optics Express
|August 20, 2010
PubMed
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A novel metallic nano-structure Bragg grating offers easier fabrication and enhanced light confinement for TM waves. It shows distinct polarization characteristics compared to conventional gratings.

Area of Science:

  • Photonics and Nanotechnology
  • Waveguide Optics
  • Plasmonics

Background:

  • Bragg gratings are crucial optical components for controlling light propagation in waveguides.
  • Conventional gratings often require complex fabrication processes like deep-etching.
  • Investigating alternative grating designs is essential for simplified manufacturing and improved performance.

Purpose of the Study:

  • To propose and theoretically investigate a compact Bragg grating with embedded gapped metallic nano-structures.
  • To analyze the polarization characteristics and light confinement properties of the proposed grating.
  • To compare its performance and fabrication feasibility with conventional deeply-etched gratings.

Main Methods:

  • Theoretical investigation of a Bragg grating comprising periodic planar metallic strips in a dielectric waveguide.

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Last Updated: Jun 10, 2026

Micro/Nano-scale Strain Distribution Measurement from Sampling Moir&#233; Fringes
06:56

Micro/Nano-scale Strain Distribution Measurement from Sampling Moiré Fringes

Published on: May 23, 2017

Writing Bragg Gratings in Multicore Fibers
08:48

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Published on: April 20, 2016

Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System
12:08

Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System

Published on: July 18, 2015

  • Analysis of light confinement for TM (transverse magnetic) and TE (transverse electric) polarized waves.
  • Comparison of spectral characteristics and mechanisms with deeply-etched gratings, considering surface plasmon polariton (SPP) effects.

    • Main Results:

    • The proposed grating acts as an insulator-metal-insulator surface plasmonic polariton waveguide grating, enhancing light confinement for TM waves.
    • TE waves exhibit strong reflection due to field mismatch, sharing similar mechanisms with deeply-etched gratings.
    • TM modes show drastically different spectral characteristics due to SPP effects, influenced by grating duty cycle.

    Conclusions:

    • The proposed metallic nano-structure grating offers easier fabrication than deeply-etched gratings, avoiding sub-micron deep-etching.
    • It demonstrates improved light confinement for TM waves via SPP effects.
    • While slightly underperforming for TE waves, its simplified fabrication presents a significant advantage.