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Related Experiment Video

Updated: Dec 25, 2025

Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
10:54

Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters

Published on: July 8, 2013

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Heterogeneous layered structures for improved terahertz generation.

Charles B Bahr, Natalie K Green, Larry K Heki

    Optics Letters
    |April 3, 2020
    PubMed
    Summary
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    Researchers developed a novel layered structure to enhance terahertz (THz) radiation generation. This structure minimizes reflective losses in nonlinear optical (NLO) organic crystals, boosting THz output by nearly 50%.

    Area of Science:

    • Photonics and Optics
    • Materials Science
    • Nonlinear Optics

    Background:

    • Terahertz (THz) radiation generation is crucial for various applications.
    • Organic crystals with nonlinear optical (NLO) properties are effective for IR to THz conversion via optical rectification.
    • High refractive indices of organic crystals cause significant reflective losses, limiting THz generation efficiency.

    Purpose of the Study:

    • To design and demonstrate a novel structure for enhancing THz generation efficiency from organic NLO crystals.
    • To reduce reflective losses of both infrared pump light and generated THz radiation.

    Main Methods:

    • Fabrication of a layered structure with intermediate refractive indices.
    • Integration of the layered structure with organic nonlinear optical crystals.

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    Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
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    Fabrication of Nanopillar-Based Split Ring Resonators for Displacement Current Mediated Resonances in Terahertz Metamaterials
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    Last Updated: Dec 25, 2025

    Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
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    Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
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  • Experimental measurement of THz radiation intensity with and without the structure.
  • Theoretical calculations to support experimental findings.

    • Main Results:

    • The layered structure significantly increases transmission coefficients for infrared pump input and THz output.
    • Experimental data shows a nearly 50% increase in generated THz intensity.
    • The structure effectively mitigates reflective losses at crystal surfaces.

    Conclusions:

    • A layered structure with intermediate refractive indices is a viable method to enhance THz generation efficiency.
    • This approach offers a practical solution to overcome reflective loss limitations in organic NLO crystals.
    • The developed structure holds promise for improving THz sources for diverse applications.