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Flat lens criterion by small-angle phase.

Peter Ott, Mohammed H Al Shakhs, Henri J Lezec

    Optics Express
    |January 22, 2015
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    Summary
    This summary is machine-generated.

    A new imaging criterion using small-angle phase can identify flat lenses and predict image locations for various systems. This method aids in designing novel flat lenses, including broadband and super-resolution capabilities.

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    Area of Science:

    • Optics and Photonics
    • Metamaterials and Nanophotonics

    Background:

    • Flat lenses offer potential for miniaturized optical systems.
    • Characterizing flat lens imaging performance remains a challenge.

    Purpose of the Study:

    • To introduce a universal criterion for identifying and characterizing flat lenses.
    • To predict the imaging capabilities of flat lenses based on their physical properties.

    Main Methods:

    • Analysis of the angular dependence of small-angle phase in planar, uniform media.
    • Validation through full-wave simulations of various flat lens configurations.

    Main Results:

    • A classical imaging criterion based on small-angle phase reliably determines flat lens capability and image location.
    • The criterion accurately predicts both far-field and near-field (super-resolved) image positions.
    • New flat lens designs for transverse-electric polarization, broadband operation (UV-Vis), and extended image planes were predicted and simulated.

    Conclusions:

    • Small-angle phase is a versatile metric for categorizing and designing flat lenses.
    • The proposed criterion simplifies the assessment of flat lens performance.
    • This work opens avenues for advanced flat lens applications.