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  • Advanced Gouy phase high harmonics interferometer

    Author(s)
    Mustary, MH
    Laban, DE
    Wood, JBO
    Palmer, AJ
    Holdsworth, J
    Litvinyuk, IV
    Sang, RT
    Griffith University Author(s)
    Sang, Robert T.
    Litvinyuk, Igor
    Year published
    2018
    Metadata
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    Abstract
    We describe an extreme ultraviolet (XUV) interferometric technique that can resolve ~100 zeptoseconds (10−21 s) delay between high harmonic emissions from two successive sources separated spatially along the laser propagation in a single Gaussian beam focus. Several improvements on our earlier work have been implemented in the advanced interferometer. In this paper, we report on the design, characterization and optimization of the advanced Gouy phase interferometer. Temporal coherence for both atomic argon and molecular hydrogen gases has been observed for several harmonic orders. It has been shown that phase shift of XUV ...
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    We describe an extreme ultraviolet (XUV) interferometric technique that can resolve ~100 zeptoseconds (10−21 s) delay between high harmonic emissions from two successive sources separated spatially along the laser propagation in a single Gaussian beam focus. Several improvements on our earlier work have been implemented in the advanced interferometer. In this paper, we report on the design, characterization and optimization of the advanced Gouy phase interferometer. Temporal coherence for both atomic argon and molecular hydrogen gases has been observed for several harmonic orders. It has been shown that phase shift of XUV pulses mainly originates from the emission time delay due to the Gouy phase in the laser focus and the observed interference is independent of the generating medium. This interferometer can be a useful tool for measuring the relative phase shift between any two gas species and for studying ultrafast dynamics of their electronic and nuclear motion.
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    Journal Title
    Journal of Physics B: Atomic, Molecular and Optical Physics
    Volume
    51
    DOI
    https://doi.org/10.1088/1361-6455/aaba40
    Subject
    Atomic, molecular and optical physics
    Theoretical and computational chemistry
    Publication URI
    http://hdl.handle.net/10072/380545
    Collection
    • Journal articles

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