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Terahertz plasmonic composites.

Syrus C Nemat-Nasser1, Alireza V Amirkhizi, Willie J Padilla

  • 1Center of Excellence for Advanced Materials, Department of Mechanical and Aerospace Engineering, University of California, San Diego, La Jolla, California 92093-0416, USA.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|May 16, 2007
PubMed
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Researchers created novel terahertz composites by embedding thin gold strips in PDMS. These artificial plasmonic materials offer tunable dielectric responses, advancing terahertz technology.

Area of Science:

  • Materials Science
  • Electromagnetism
  • Nanotechnology

Background:

  • Polymer matrix composites can be tuned using artificial plasmonic media.
  • Previous studies focused on microwave frequencies, requiring larger structures.

Purpose of the Study:

  • To design, fabricate, and characterize polymer composites for terahertz frequencies.
  • To achieve tunable dielectric response at terahertz (THz) frequencies.

Main Methods:

  • Numerical modeling to design artificial plasmonic media.
  • Lithographic embedding of thin gold strips into a poly(dimethylsiloxane) (PDMS) matrix.
  • Characterization using Fourier-transform infrared interferometry and Kramers-Kronig relations.

Main Results:

Related Experiment Videos

  • Designed artificial plasmonic media with THz turn-on frequencies.
  • Fabricated prototype samples with reduced wire thickness and spacing.
  • Demonstrated excellent agreement between theoretical design, numerical modeling, and experimental characterization.

Conclusions:

  • Successfully demonstrated the creation of composites with tuned dielectric response at THz frequencies.
  • This work pioneers tunable THz metamaterials for advanced electromagnetic applications.