Autofocusing and Self-Healing Optical Vortices Realized via Circular Cubic Phase Modulation

Optical vortices have drawn extensive research interests due to their widespread applications in various fields. Therefore, it is of great significance modulate optical endow them with more properties. Herein, the autofocusing and self-healing properties are introduced via implementing circular cubic phase modulation. The propagation dynamics modulated vortex analyzed, experimental results match well simulations. Moreover, autodefocusing can also be generated, flexible switching between state easily realized by adjusting helicity incident polarization. Besides, topological charges two states experimentally verified. Our study provides a novel way vortices, which may enrich optics photonics.