Figure 1: Self-healing property of BG beams.
From: Self-healing of quantum entanglement after an obstruction
The BG beam is generated using a computer-generated hologram of an axicon (yellow triangle) and exists in a finite region, zmax (pink diamond). An obstacle placed in the centre of the BG region (black rectangle) obstructs the beam for a minimum distance, zmin (grey triangle), after which the BG field reforms. The insets display the expected image of the beam at four different planes.
