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Unveiling square and triangular optical lattices: a comparative study.

Juarez G Silva, Alcenísio J Jesus-Silva, Márcio A R C Alencar

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    This summary is machine-generated.

    We used Fraunhofer diffraction with light possessing orbital angular momentum (OAM) to create optical lattices. Square apertures reveal OAM twice as effectively as triangular ones, precisely measuring topological charge up to 20.

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    Area of Science:

    • Optics and Photonics
    • Quantum Information Science

    Background:

    • Orbital angular momentum (OAM) is a key property of light.
    • Optical lattices are crucial for quantum technologies and atom manipulation.
    • Diffraction techniques offer methods for characterizing light properties.

    Purpose of the Study:

    • To investigate square and triangular optical lattice formation using light with OAM.
    • To compare the effectiveness of square and triangular apertures in revealing OAM.
    • To determine the precision and limits of topological charge (TC) measurement using these apertures.

    Main Methods:

    • Utilizing Fraunhofer diffraction of light carrying orbital angular momentum (OAM).
    • Employing both square and triangular apertures for optical lattice generation.
    • Analyzing diffraction patterns to measure topological charge (TC) modulus and sign.

    Main Results:

    • Square apertures enable the unveiling of OAM approximately two times greater than triangular apertures.
    • Observed pattern truncation up to a topological charge (TC) of 20 with high precision.
    • Combined analysis of square and triangular aperture patterns allows TC sign determination up to 20.

    Conclusions:

    • Square apertures offer enhanced capabilities for OAM measurement compared to triangular ones.
    • The diffraction method provides precise measurement of high-order TC modulus and sign.
    • This technique is valuable for applications requiring precise control and characterization of light's OAM.