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Author: Grunwald R. × End date: 2024 × Start date: 2020 × Start date: 1990 × Publisher: Abingdon : Taylor and Francis Ltd. × WGL Institute: MBI ×

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    Needle beams: a review
    (Abingdon : Taylor and Francis Ltd., 2020) Grunwald R.; Bock M.
    Needle beams are highly attractive for applications which take advantage from a spatial and temporal localization of photons. High intensities, high resolution and extended depth of focus lead to fundamental advances in the optical system performance. Ultrashort, fringe-free, self-reconstructing nondiffracting pulses with undistorted temporal transfer are obtained by generating truncated Bessel beams under self-apodization conditions. Nondiffracting Talbot self-imaging of needle beam arrays enables to transfer near field information to the Fraunhofer zone. With addressable arrays of needle beams, reconfigurable time-wavefront sensors are built up. Moreover, spatial light modulators and flexible axicons are used to realize structured, highly localized wavepackets, accelerating beams and nondiffracting images. © 2020, © 2020 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.