[8] A. Aiello, P. Banzer. The ubiquitous photonic wheel. J. Opt., 18, 085605(2016).
[15] M. Born, E. Wolf. Principles of Optics: Electromagnetic Theory of Propagation, Interference and Diffraction of Light(1999).
[17] M.-S. Kim, T. Scharf, C. Rockstuhl, H. P. Herzig. Phase anomalies in micro-optics. Prog. Opt., 58, 115(2013).
[28] G. Indebetouw. Optical vortices and their propagation. J. Mod. Opt., 40, 73(1993).
[29] B. Richards, E. Wolf. Electromagnetic diffraction in optical systems. II. Structure of the image field in an aplanatic system. Proc. R. Soc. A, 253, 358(1959).