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Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
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Planar plasmonic terahertz guided-wave devices.

Wenqi Zhu1, Amit Agrawal, Ajay Nahata

  • 1Department of Electrical and Computer Engineering, University of Utah, Salt Lake City, UT 84112, USA.

Optics Express
|June 12, 2008
PubMed
Summary
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Researchers created novel terahertz (THz) guided-wave devices using perforated metal films. These films act as engineered effective media, enabling compact THz circuits with excellent wave confinement.

Area of Science:

  • Optics and Photonics
  • Metamaterials
  • Terahertz (THz) Technology

Background:

  • Terahertz (THz) guided-wave devices are crucial for emerging THz applications.
  • Developing compact and efficient THz devices remains a significant challenge.
  • Existing methods often lack tunability and miniaturization capabilities.

Purpose of the Study:

  • To experimentally realize planar plasmonic THz guided-wave devices.
  • To demonstrate the engineering of effective dielectric properties using perforated metal films.
  • To showcase the functionality of these devices in complex circuit configurations.

Main Methods:

  • Fabrication of periodically perforated metal films.
  • Utilizing transmission measurements to determine complex dielectric constants.

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Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
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10:28

Fabrication of Nanopillar-Based Split Ring Resonators for Displacement Current Mediated Resonances in Terahertz Metamaterials

Published on: March 23, 2017

  • Characterizing the effective plasma frequency in relation to aperture cutoff frequency.

    • Main Results:

    • Perforated films exhibit engineered dielectric functions, acting as effective media.
    • Effective plasma frequency was experimentally shown to match the rectangular aperture cutoff frequency.
    • Demonstrated functional planar THz waveguides, Y-splitters, and 3-dB couplers.
    • Propagating THz radiation showed excellent in-plane and out-of-plane confinement.

    Conclusions:

    • The proposed perforated metal film approach enables versatile THz guided-wave device fabrication.
    • This method offers a pathway for creating compact and efficient passive and active THz circuits.
    • Opens new possibilities for integrated terahertz technology and applications.