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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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Meta-coupler empowered dynamic wavefront control with on-chip polarization reconfiguration.

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    Researchers developed a new on-chip metasurface waveguide for dynamic light field control. This integrated platform enables simultaneous guided wave radiation, polarization multiplexing, and wavefront manipulation for compact meta-devices.

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    Area of Science:

    • Photonics and Nanotechnology
    • Integrated Optics
    • Metasurface Engineering

    Background:

    • Metasurfaces offer advanced light field manipulation but often have static functionalities post-fabrication.
    • Existing dynamic metasurfaces frequently require free-space operation, specialized materials, or bulky external control systems.
    • This limits their integration into compact, on-chip devices.

    Purpose of the Study:

    • To develop an integrated platform for dynamic wavefront shaping using on-chip metasurfaces.
    • To achieve simultaneous guided wave radiation, polarization multiplexing, and dynamic wavefront control.
    • To overcome the limitations of static metasurfaces and bulky external control mechanisms.

    Main Methods:

    • Utilized an on-chip geometric metasurface integrated with a lithium-niobate-on-insulator waveguide.
    • Leveraged polarization reconfiguration of guided waves for multifunctional control.
    • Demonstrated proof-of-principle functionalities including tunable multifocal metalenses, dynamic zoom metalenses, and dynamic holography.

    Main Results:

    • Achieved simultaneous guided wave radiation, polarization multiplexing, and dynamic wavefront manipulation on a single chip.
    • Demonstrated intensity-continuously tunable multifocal metalenses.
    • Showcased dynamic zoom metalenses and dynamic holography capabilities.

    Conclusions:

    • The developed integrated platform enables dynamic wavefront shaping with unprecedented functionality on-chip.
    • This approach paves the way for compact, multifunctional meta-devices for integrated photonics.
    • Advances chip-integrated dynamic wavefront control for future optical systems.