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Yellow-light negative-index metamaterials.

Shumin Xiao1, Uday K Chettiar, Alexander V Kildishev

  • 1School of Electrical and Computer Engineering and Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, USA.

Optics Letters
|November 21, 2009
PubMed
Summary
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Researchers miniaturized a silver fishnet design to create a novel negative-index material. This metamaterial achieves a negative refractive index at a record short wavelength of 580 nm.

Area of Science:

  • Metamaterials and Nanophotonics
  • Electromagnetism and Optics

Background:

  • Negative-index materials (NIMs) exhibit unusual electromagnetic properties, including a negative refractive index.
  • Previous NIM designs have been limited to longer wavelengths, restricting their applications.
  • Miniaturization of metamaterial structures is crucial for extending their operational range to shorter wavelengths.

Purpose of the Study:

  • To miniaturize a silver fishnet design for operation at visible light wavelengths.
  • To demonstrate a negative refractive index at a record short wavelength.
  • To investigate the electromagnetic properties of the miniaturized metamaterial.

Main Methods:

  • Fabrication of a miniaturized silver fishnet structure.
  • Experimental measurement of transmittance and reflectance spectra.

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Last Updated: Jun 18, 2026

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
13:44

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

Published on: December 27, 2012

Fabricating Metamaterials Using the Fiber Drawing Method
11:57

Fabricating Metamaterials Using the Fiber Drawing Method

Published on: October 18, 2012

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05:45

A Method to Fabricate Disconnected Silver Nanostructures in 3D

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  • Numerical simulations to validate experimental findings and understand electromagnetic response.

    • Main Results:

    • Successful miniaturization of the silver fishnet design.
    • Experimental confirmation of a negative refractive index.
    • Achieved a negative refractive index of -0.25 at a wavelength of 580 nm (yellow light).

    Conclusions:

    • The miniaturized silver fishnet design represents a significant advancement in NIM technology.
    • This work extends the operational range of NIMs to shorter wavelengths, opening new possibilities for optical applications.
    • The demonstrated negative refractive index at 580 nm is a key step towards visible-light metamaterial devices.