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Fabrication of Nanopillar-Based Split Ring Resonators for Displacement Current Mediated Resonances in Terahertz Metamaterials
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Published on: March 23, 2017

Terahertz metamaterials with semiconductor split-ring resonators for magnetostatic tunability.

Jiaguang Han1, Akhlesh Lakhtakia, Cheng-Wei Qiu

  • 1Department of Physics, National University of Singapore, Singapore. phyhanj@nus.edu.sg

Optics Express
|September 17, 2008
PubMed
Summary

This study demonstrates tunable terahertz resonance in semiconductor split-ring resonator metasurfaces using an external magnetic field. This tunability extends to 3D metamaterials, offering new possibilities for terahertz applications.

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Electromagnetism

Background:

  • Metasurfaces offer unique electromagnetic properties.
  • Semiconductor split-ring resonators are key components in metasurface design.
  • Terahertz (THz) frequency applications require tunable materials.

Purpose of the Study:

  • To investigate the tunability of resonance frequencies in semiconductor split-ring resonator metasurfaces.
  • To explore the application of external magnetostatic fields for frequency control.
  • To extend these findings to three-dimensional (3D) metamaterials.

Main Methods:

  • Fabrication of a metasurface composed of a periodic array of semiconductor split-ring resonators.
  • Excitation of the metasurface with normally incident light.
  • Application of an external magnetostatic field to tune resonance frequencies.

Main Results:

  • Continuous tunability of resonance frequencies was achieved in the terahertz regime.
  • The tuning was accomplished using an external magnetostatic field with a specific orientation.
  • The findings are applicable to both 2D metasurfaces and 3D metamaterials.

Conclusions:

  • Semiconductor split-ring resonator metasurfaces exhibit magnetically tunable terahertz resonance.
  • This tunability is a significant advancement for terahertz metamaterial applications.
  • The developed metasurface design provides a pathway for creating novel tunable 3D metamaterials.