Specular and vortical Airy beams

摘要: Abstract A new kind of truncated Airy beams is investigated and discussed. These are a superposition shifted functions its specular counterparts, where zeroes or extremal points the function chosen as truncation point. The smooth at point produce diffraction pattern similar to Hermite–Gaussian modes. Under propagation in Fresnel zone, demonstrate symmetrical acceleration opposite sides beam divergence proportional traveled distance squared. astigmatic mode converter transforms two-dimensional into quasi-annular field with nonzero orbital angular momentum. Vortical based on also Laguerre–Gaussian modes, while their annular structure changed during propagation.