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Joule-class THz pulses from microchannel targets.

G Bruhaug, H G Rinderknecht, K Weichman

    Optics Letters
    |April 1, 2024
    PubMed
    Summary

    Researchers developed high-energy terahertz (THz) radiation sources using microchannel targets and picosecond lasers. These powerful THz sources are crucial for advanced applications in physics and particle manipulation.

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    Area of Science:

    • Physics
    • Laser Science
    • Plasma Physics

    Background:

    • Terahertz (THz) radiation offers unique properties for scientific research and technological applications.
    • Generating high-energy THz sources efficiently has been a significant challenge in the field.

    Purpose of the Study:

    • To report the development of joule-class THz radiation sources.
    • To investigate the use of microchannel targets for enhanced laser-to-THz energy conversion.

    Main Methods:

    • Utilizing hundreds of joules of energy from picosecond lasers.
    • Employing microchannel targets to interact with the laser pulses.
    • Measuring the generated THz radiation and conversion efficiency.

    Main Results:

    • Successfully generated joule-class THz radiation.
    • Microchannel targets showed higher laser-to-THz conversion efficiency than planar foil targets.
    • Achieved up to approximately 0.9% laser energy to THz energy conversion.

    Conclusions:

    • Microchannel targets are effective for producing high-energy THz radiation.
    • These THz sources have potential applications in nonlinear optics and charged-particle manipulation.
    • The demonstrated efficiency advances the feasibility of using THz radiation in advanced scientific experiments.