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Related Experiment Video

Updated: Sep 11, 2025

Atomic Layer Deposition of Vanadium Dioxide and a Temperature-dependent Optical Model
11:10

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Multifunctional metasurface based on vanadium dioxide in the terahertz frequency.

Zou Long, Zhengji Xu

    Applied Optics
    |August 12, 2025
    PubMed
    Summary

    This study presents a tunable metasurface using vanadium dioxide for versatile terahertz applications. It demonstrates vortex beam generation, focusing, polarization conversion, and absorption, paving the way for advanced terahertz communication and imaging systems.

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    Area of Science:

    • Optics and Photonics
    • Materials Science
    • Electromagnetics

    Background:

    • Metasurface technology is rapidly advancing, with multi-multiplexing and tunability becoming key research areas.
    • Vanadium dioxide exhibits temperature-dependent phase change properties, making it suitable for tunable devices.

    Purpose of the Study:

    • To design and propose a novel metasurface capable of multiple functions including vortex beam generation, beam focusing, polarization conversion, and absorption.
    • To leverage the phase change properties of vanadium dioxide for dynamic control of terahertz wave manipulation.

    Main Methods:

    • Numerical simulations were employed to analyze the metasurface's performance.
    • The metasurface design was based on the temperature-dependent dielectric properties of vanadium dioxide.

    Main Results:

    • At 25°C, the metasurface generated vortex beams and focused beams for circularly polarized incident waves, achieving linear-to-circular polarization conversion in the 0.5-0.9 THz and 1.2-1.5 THz ranges.
    • At 68°C, the metasurface functioned as an absorber for y-polarized waves at 1.55 THz.

    Conclusions:

    • The proposed vanadium dioxide-based metasurface offers multi-functional and tunable terahertz wave manipulation capabilities.
    • This technology holds significant potential for applications in terahertz communication and imaging systems.