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Related Experiment Video

Updated: Apr 25, 2026

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

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Cost-efficient delay generator for fast terahertz imaging.

T Probst, A Rehn, S F Busch

    Optics Letters
    |August 15, 2014
    PubMed
    Summary
    This summary is machine-generated.

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    We developed a fast, low-cost terahertz (THz) delay generator using a rotating dielectric cube. This device enables rapid, coherent sampling for advanced THz imaging applications.

    Area of Science:

    • Optics and Photonics
    • Terahertz Science and Technology

    Background:

    • Terahertz (THz) wave applications require precise control over signal delay.
    • Existing THz delay generators can be complex, costly, or slow.

    Purpose of the Study:

    • To introduce a novel, fast, and cost-effective delay generator for terahertz waves.
    • To demonstrate its utility in coherent sampling and THz imaging.

    Main Methods:

    • Utilizing a transparent dielectric cube whose rotational motion induces a variable THz delay.
    • Integrating the device into a standard THz beam path for seamless implementation.
    • Employing coherent sampling techniques to achieve high temporal resolution.

    Main Results:

    • Achieved a total delay range of 40 picoseconds (ps).

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    Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
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  • Demonstrated a high scan rate of hundreds of hertz, enabling rapid data acquisition.
  • Confirmed the device's suitability for fast THz imaging applications.

    • Conclusions:

    • The rotational dielectric cube method offers a simple yet effective approach to THz delay generation.
    • This technology facilitates high-speed THz imaging and other time-resolved THz spectroscopy techniques.
    • The low cost and ease of implementation make it broadly applicable.