Propagation properties of the accelerating beams generated by discrete Airy-Vortex phase mask

Photorefractive Photonics 2017

Han, Kun^1,2 ; Ji, Kaiwen^1,2 ; Zhang, Guoquan^3 ; Qi, Xinyuan^1,2

School of Physics, Northwest University, Xi' an

710069, China^1

National Key Laboratory of Photoelectric Technology and Functional Materials (Culture Base), Institute of Photonics and Photon-Technology, Northwest University, Xi' an

710069, China^2

MOE Key Laboratory of Weak-Light Nonlinear Photonics, TEDA Applied Physics Institute, School of Physics, Nankai University, Tianjin

300457, China^3

关键词: Holographic technology;    Intensity distribution;    Near fields;    Parabolic trajectories;    Phase masks;    Propagation paths;    Propagation properties;    Topological gradient;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/867/1/012021/pdf
DOI  :  10.1088/1742-6596/867/1/012021

来源: IOP

【 摘 要 】

We present a novel type of accelerating beam generated by a discrete Airy-Vortex phase mask based on the digital holographic technology. The study shows that the main lobe and the side lobes of such beam rotate with different angular momentums and the whole beam evolves into two separated Airy-like beams in the far field. The intensity distribution of the main lobe and the side lobes in the near field can be modulated by tuning the topological gradient ΔL1and ΔL independently. The propagation path of the main lobe follows a parabolic trajectory. The experimental results are consistent with the numerical simulations.