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Generating terahertz perfect optical vortex beams by diffractive elements.

Yongqiang Yang, Xi Ye, Liting Niu

    Optics Express
    |March 4, 2020
    PubMed
    Summary
    This summary is machine-generated.

    Researchers demonstrate a new method to create terahertz (THz) perfect optical vortex (POV) beams using 3D-printed diffractive elements. The beam

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    Area of Science:

    • Optics and Photonics
    • Terahertz Science and Technology

    Background:

    • Perfect optical vortex (POV) beams offer unique properties for advanced applications.
    • Terahertz (THz) technology is crucial for next-generation communication and sensing.

    Purpose of the Study:

    • To propose and experimentally validate an effective scheme for generating THz POV beams.
    • To investigate the relationship between beam parameters and topological charge.

    Main Methods:

    • Designing and fabricating two diffractive elements using 3D-printing.
    • Utilizing a 0.1 THz frequency source for beam generation.
    • Conducting numerical simulations and experimental verification.

    Main Results:

    • Successfully generated THz POV beams with controllable ring radius.
    • Demonstrated that the ring radius is independent of the topological charge.
    • Established a positive linear relationship between ring radius and radial wave vector.

    Conclusions:

    • The proposed diffractive element system effectively generates THz POV beams.
    • The ability to freely adjust the ring radius opens new possibilities for THz applications.
    • These generated beams show significant promise for novel THz fiber communication systems.