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Related Experiment Video

Updated: Feb 25, 2026

Evaluating Plasmonic Transport in Current-carrying Silver Nanowires
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Broadband Anti-Reflective Coating Based on Plasmonic Nanocomposite.

Mehdi Keshavarz Hedayati1, Moheb Abdelaziz2, Christoph Etrich3

  • 1Nanochemistry and Nanoengineering, Institute for Materials Science, Faculty of Engineering, Christian-Albrechts-Universität zu Kiel, Kiel 24143, Germany. mke@tf.uni-kiel.de.

Materials (Basel, Switzerland)
|August 5, 2017
PubMed
Summary

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This summary is machine-generated.

This study introduces a novel gold-silica nanocomposite for broadband anti-reflective coatings (ARC). The ultrathin ARC significantly reduces silicon reflectivity across visible and near-infrared spectra, with negligible angular sensitivity.

Area of Science:

  • Materials Science
  • Optics
  • Nanotechnology

Background:

  • Silicon substrates are widely used but suffer from high reflectivity, limiting their efficiency in optical applications.
  • Existing anti-reflective coatings (ARCs) often have limitations in bandwidth, thickness, or angular performance.

Purpose of the Study:

  • To develop and characterize a novel broadband anti-reflective coating (ARC) for silicon substrates using a gold-silica nanocomposite.
  • To investigate the optical properties and performance of the ARC for visible and near-infrared (NIR) wavelengths.

Main Methods:

  • Fabrication and characterization of a two-layer ARC comprising a gold-silica nanocomposite and a pure silica film.
  • Optical simulations and experimental validation of the ARC's anti-reflective properties.
Keywords:
absorbing antireflective coatingantireflectionantireflective coatingplasmonic nanocomposite

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  • Tuning the ARC performance by adjusting the volume filling fraction of gold clusters.

    • Main Results:

    • Achieved average reflectivity of silicon below 0.1% across the entire visible spectrum.
    • Demonstrated anti-reflectivity up to the NIR with a 20 nm thick percolated nanocomposite.
    • Showcased a tunable ARC bandwidth exceeding 500 nm, covering NIR wavelengths.
    • Confirmed negligible angular sensitivity up to 60 degrees.

    Conclusions:

    • The developed gold-silica nanocomposite ARC offers exceptional broadband anti-reflection for silicon.
    • The ultrathin and wide-angle tolerant nature of the ARC makes it suitable for advanced applications.
    • Potential applications include thermo-photovoltaics and bolometers.