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Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
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Temporal reshaping of two-dimensional pulses.

Colin J R Sheppard, Shan Shan Kou, Jiao Lin

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

    Focusing ultrafast pulses in 2D requires asymmetric input pulses for a symmetrical output. This differs from 3D focusing and indicates limitations for 2D photonic and plasmonic devices.

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    Area of Science:

    • Physics
    • Optics
    • Nanotechnology

    Background:

    • Ultrafast pulse focusing is crucial for advanced photonic and plasmonic devices.
    • Understanding the limitations of two-dimensional (2D) focusing is essential for device performance.

    Purpose of the Study:

    • To analyze cylindrical focusing of 2D pulses.
    • To compare 2D focusing with three-dimensional (3D) spherical focusing.
    • To investigate the temporal symmetry of focused pulses.

    Main Methods:

    • Analytical study of complete cylindrical focusing.
    • Consideration of ingoing and outgoing pulsed waves with finite energy spectral distribution.
    • Comparison of 2D and 3D focusing scenarios.

    Main Results:

    • In 2D, an asymmetric input pulse is necessary for a temporally symmetrical focal pulse.
    • A symmetrical outgoing pulse can result from an asymmetric source or an anti-symmetric input pulse.
    • These 2D findings contrast significantly with 3D focusing behavior.

    Conclusions:

    • Fundamental limitations exist for ultrafast, tightly focused 2D devices.
    • The temporal symmetry of focused pulses is highly dependent on dimensionality.
    • Results impact the design and capabilities of planar photonic and plasmonic devices.