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Highly deformable and high-performance optical paper-based perovskite terahertz modulator.

Xiaochen Fan, Lu Xiao, Weiyi Zhou

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    |August 13, 2025
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    We developed a flexible, biodegradable paper-based perovskite terahertz modulator. This device offers superior performance for dynamic terahertz wave control in applications like shielding and stealth technologies.

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    Area of Science:

    • Materials Science
    • Optics and Photonics
    • Condensed Matter Physics

    Background:

    • Terahertz (THz) modulators are crucial for controlling THz wave propagation.
    • Existing THz modulators often lack flexibility, biodegradability, or optimal performance.
    • Perovskite materials offer unique optoelectronic properties suitable for THz applications.

    Purpose of the Study:

    • To design and fabricate a novel optical paper-based perovskite (CH3NH3PbBr3) terahertz modulator.
    • To evaluate the modulation performance and flexibility of the developed device.
    • To explore the potential of this device for dynamic THz wave control.

    Main Methods:

    • Fabrication of a paper-based substrate integrated with methylammonium lead bromide (CH3NH3PbBr3) perovskite.
    • Characterization of terahertz transmission and reflection modulation.
    • Assessment of device performance under bending stress.
    • Investigation of light-induced terahertz absorption properties.

    Main Results:

    • Achieved broadband terahertz transmission and reflection modulation of 30% and 50%, respectively.
    • Demonstrated superior modulation performance compared to quartz-based polycrystalline samples.
    • Confirmed strong bending stability of the paper-based device.
    • Observed light-induced decrease in reflection and transmission, indicating strong THz absorption.

    Conclusions:

    • The developed paper-based perovskite terahertz modulator exhibits high performance and excellent flexibility.
    • The device shows potential for dynamic terahertz wave control, including absorption, shielding, and stealth applications.
    • This approach offers a sustainable and eco-friendly alternative for future THz devices due to its flexibility and biodegradability.