The enhancement of the abruptly autofocusing property with multiple circular Airy beams carrying lens phase factors

To improve the abruptly autofocusing property of circular Airy beam, we propose a method to generate multiple circular Airy beams (MCAB) carrying lens phase factors using a spatial light modulator (SLM). The propagation dynamics of this kind of beam is theoretically simulated, as well as experimentally verified. It is shown that four identical beams are produced symmetrically and they can move toward the center simultaneously. By changing the lens phase information encoded in the SLM, we can achieve different focal positions and focal intensities as we want. With the same parameters, compared with a single circular Airy beam (SCAB), there are two focal planes and the abruptly autofocusing property can be greatly enhanced. It may have some applications in various fields.