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    Area of Science:

    • Optics and Photonics
    • Metamaterials
    • Nanophotonics

    Background:

    • Optical beam steering is crucial for technologies like lidar and optical communications.
    • Phased-array systems offer high speed but face a trade-off between steering range and beam divergence.
    • Existing methods struggle to achieve both wide-angle steering and narrow beam divergence simultaneously.

    Purpose of the Study:

    • To present a new optical beam-steering technique that overcomes the range-resolution trade-off.
    • To demonstrate a method for achieving wide angular range and high angular resolution in optical beam steering.
    • To circumvent the limitations of conventional phased-array beam-steering systems.

    Main Methods:

    • Wavefront shaping using a disorder-engineered metasurface.
    • Experimental demonstration of the proposed beam-steering technique.
    • Characterization of steering range and angular resolution.

    Main Results:

    • Continuous optical beam steering over a 160° range (80° from normal incidence).
    • Achieved an angular resolution of approximately 0.01°.
    • The method circumvents the typical range-divergence trade-off inherent in phased-array systems.

    Conclusions:

    • The disorder-engineered metasurface enables unprecedented optical beam steering capabilities.
    • This technique offers a promising solution for high-speed optical systems requiring both wide angular coverage and precise control.
    • Future applications in lidar, optical communications, and sensing can benefit from this advanced beam-steering approach.