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DIFFRACTION-FREE BEAMS

Straightening light sheets

Diffraction-free light-sheet beams, strongly confined in one axis, are typically thought to self-bend during propagation in free space and cannot be made flat. Now, diffraction-free planar light sheets in air have been realized by exploiting polychromatic pulsed beams.

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Fig. 1: Isofrequency contours of ω(k x ,k z ).
Fig. 2: Isofrequency diagrams in free space.

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Correspondence to Juan José Sáenz.

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Sáenz, J.J. Straightening light sheets. Nature Photon 11, 686–688 (2017). https://doi.org/10.1038/s41566-017-0039-6

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