Unraveling beam self-healing.

@article{Aiello2017UnravelingBS,
  title={Unraveling beam self-healing.},
  author={Andrea Aiello and Girish S. Agarwal and Martin Pa{\'u}r and Bohumil Stoklasa and Zdeněk Hradil and Jaroslav Řeh{\'a}{\vc}ek and Pablo de la Hoz and Gerd Leuchs and Luis L. S{\'a}nchez-Soto},
  journal={Optics express},
  year={2017},
  volume={25 16},
  pages={
          19147-19157
        }
}
We show that, contrary to popular belief, diffraction-free beams may not only reconstruct themselves after hitting an opaque obstacle but also, for example, Gaussian beams. We unravel the mathematics and the physics underlying the self-reconstruction mechanism and we provide for a novel definition for the minimum reconstruction distance beyond geometric optics, which is in principle applicable to any optical beam that admits an angular spectrum representation. Moreover, we propose to quantify… 

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