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Related Concept Videos

Electromagnetic Waves in Matter01:30

Electromagnetic Waves in Matter

Electromagnetic waves can travel in the vacuum as well as in matter. For example light, which is an electromagnetic wave, can travel through air, water, or glass.
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Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
13:44

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

Published on: December 27, 2012

Memory metamaterials.

T Driscoll1, Hyun-Tak Kim, Byung-Gyu Chae

  • 1Department of Physics, University of California at San Diego (UCSD), La Jolla, CA 92093, USA. tdriscol@physics.ucsd.edu

Science (New York, N.Y.)
|August 22, 2009
PubMed
Summary
This summary is machine-generated.

Researchers developed frequency-agile metamaterials with persistent tuning capabilities. This breakthrough allows lasting changes to metamaterial responses using transient stimuli, interfacing with memory devices.

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Area of Science:

  • Metamaterials Science
  • Condensed Matter Physics
  • Electrical Engineering

Background:

  • Metamaterials possess unique properties due to resonant elements, but are limited by narrow usable frequency bandwidths.
  • Frequency-agile metamaterials offer real-time tuning to overcome bandwidth limitations.
  • Persistent tuning mechanisms are needed for stable, long-term control of metamaterial properties.

Purpose of the Study:

  • To demonstrate electrically controlled persistent frequency tuning in metamaterials.
  • To explore the integration of metamaterials with memory device concepts.
  • To overcome the inherent bandwidth limitations of traditional metamaterials.

Main Methods:

  • Fabrication of metamaterials with electrically tunable resonant elements.
  • Application of transient electrical stimuli for tuning.
  • Characterization of the metamaterial's frequency response before and after stimuli.
  • Demonstration of persistent state retention.

Main Results:

  • Achieved persistent frequency tuning of metamaterial response via electrical control.
  • Demonstrated that the tuning effect is retained after the stimulus is removed.
  • Showcased a form of memory capacitance within the metamaterial system.

Conclusions:

  • Electrically controlled persistent frequency tuning is achievable in metamaterials.
  • This technology enables lasting modifications to metamaterial properties.
  • The developed system interfaces metamaterials with memory devices, opening new application avenues.