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Chemically Responsive Elastomers Exhibiting Unity-Order Refractive Index Modulation.

Di M Wu1, Michelle L Solomon2, Gururaj V Naik2

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Advanced Materials (Deerfield Beach, Fla.)
|January 10, 2018
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Summary
This summary is machine-generated.

Chemically tunable metamaterials mimic chameleons, offering dynamic color and refractive index control without external power. This breakthrough enables advanced applications like active camouflage and novel optical sensors.

Keywords:
elastomersellipsometrymetamaterialsrefractive index

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Area of Science:

  • Metamaterials Science
  • Nanophotonics
  • Materials Engineering

Background:

  • Chameleons exhibit remarkable color-changing abilities.
  • Engineered materials offer potential for active camouflage and sensors.
  • Existing artificial chameleon skins have limitations like power requirements and stiffness.

Purpose of the Study:

  • To develop a chemically tunable, large-area metamaterial with dynamic optical properties.
  • To overcome limitations of existing artificial chameleon skin technologies.

Main Methods:

  • Fabrication of an ordered monolayer of nanoresonators.
  • Dynamic tuning of optical response via solvent infiltration of a polymer substrate.
  • Characterization of magnetic response and resonator spacing effects.

Main Results:

  • Demonstration of a wide range of colors and refractive indices.
  • Achieved unity-order refractive index tuning, exceeding traditional materials.
  • Material exhibited a strong magnetic response and tunable effective permittivity and permeability.
  • Demonstrated robustness to cycling.

Conclusions:

  • The developed metamaterial offers a new pathway for programmable optical elements.
  • This technology enables responsive light routing and advanced optical devices.
  • The chemically tunable approach overcomes key limitations of previous artificial chameleon skins.