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Atomic Layer Deposition of Vanadium Dioxide and a Temperature-dependent Optical Model
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Electrically controllable optical switch metasurface based on vanadium dioxide.

Yukuan Ma, Hao Zhou, Yulei Huang

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    |August 1, 2023
    PubMed
    Summary
    This summary is machine-generated.

    We developed a voltage-controlled optical switch using a gold metasurface on vanadium dioxide. This tunable device modulates near-infrared light by over 20 dB, enabling new applications in optical signal processing.

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    Area of Science:

    • Metamaterials and Nanophotonics
    • Solid-State Physics
    • Optoelectronics

    Background:

    • Metasurfaces offer unique light manipulation capabilities.
    • Vanadium dioxide (VO2) exhibits a temperature- and voltage-dependent insulator-to-metal phase transition.
    • Tunable optical devices are crucial for advanced photonic applications.

    Purpose of the Study:

    • To demonstrate a voltage-tunable reflective metasurface.
    • To leverage the phase transition of vanadium dioxide for optical modulation.
    • To create a novel optical switch for near-infrared applications.

    Main Methods:

    • Fabrication of a metal-insulator-metal (MIM) structure with a gold wire grid on VO2.
    • Excitation of surface plasmon polariton (SPP) modes on the gold surface.
    • Utilizing laser-induced graphene (LIG) for voltage-controlled Joule heating of VO2.

    Main Results:

    • Achieved a voltage-tunable reflective metasurface.
    • Observed significant disruption of SPP modes due to VO2 phase transition.
    • Demonstrated a maximum modulation depth (MD) exceeding 20 dB.
    • Realized a tunable metasurface optical switch.

    Conclusions:

    • Presented an effective and simple method for creating tunable metasurfaces in the near-infrared.
    • The developed metasurface switch shows potential for optical signal processing, optical storage, and holography.
    • Voltage control of VO2 phase transition is a viable strategy for tunable photonic devices.