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    Area of Science:

    • Photonics and optical engineering.
    • Materials science, focusing on chalcogenide phase-change materials.
    • Computational imaging and analog computing.

    Background:

    • Optical analog computing offers low-energy, high-speed imaging solutions.
    • Nonlocal metasurfaces perform analog image processing efficiently.
    • Current metasurfaces have fixed functionalities after fabrication.

    Purpose of the Study:

    • To develop reconfigurable nonlocal metasurfaces for versatile optical analog computing.
    • To demonstrate switching between different imaging modes using a single device.
    • To explore the potential of novel materials for dynamic optical functions.

    Main Methods:

    • Fabrication of nonlocal metasurfaces using low-loss chalcogenide phase-change materials (Sb2Se3).
    • Investigation of the reconfigurability of metasurface properties.
    • Demonstration of switching between 2D edge-detection, bright-field imaging, and image blurring modes.

    Main Results:

    • Achieved reconfigurable nonlocal metasurfaces with low-loss chalcogenide materials.
    • Successfully demonstrated switching between edge-detection and bright-field imaging modes.
    • Showcased the ability to switch between edge-detection and image blurring modes.

    Conclusions:

    • Reconfigurable nonlocal metasurfaces offer dynamic control over optical beam manipulation.
    • Chalcogenide phase-change materials enable versatile imaging functionalities in compact devices.
    • This work paves the way for adaptable optical analog computing and next-generation imaging systems.