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Updated: Feb 2, 2026

Creating Virtual-hand and Virtual-face Illusions to Investigate Self-representation
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Target illusion by shifting a distance.

Chengfu Yang, Ming Huang, Jingjing Yang

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    PubMed
    Summary
    This summary is machine-generated.

    A new homogeneous illusion device can act as an invisible cloak or shifting medium. Its function depends on the shifting distance, offering practical applications for stealth technology.

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    Area of Science:

    • Electromagnetism and Optics
    • Metamaterials and Nanophotonics

    Background:

    • Coordinate transformation methods have enabled the design of advanced optical devices.
    • Previous cloaking devices often suffer from complex material parameters and limited functionality.

    Purpose of the Study:

    • To propose and design a novel homogeneous illusion device with arbitrary polygonal cross-sections.
    • To investigate its dual functionality as an invisible cloak or a shifting medium.
    • To explore its potential applications in stealth and camouflage.

    Main Methods:

    • Design based on the coordinate transformation method.
    • Derivation of homogeneous material parameters.
    • Verification through full-wave electromagnetic simulations.

    Main Results:

    • The device's function (cloak or shifting medium) is determined by a shifting distance relative to the polygon's circum-radius (2a).
    • A shifting distance > 2a results in cloaking; < 2a results in a shifting medium effect.
    • Homogeneous material parameters enhance practicality for real-world applications.

    Conclusions:

    • The developed device represents a novel interactive cloak, distinct from prior designs.
    • Validated shifting properties demonstrate virtual object displacement and image generation.
    • This work paves the way for practical illusion devices in areas like military stealth and object protection.