研究了硬边环带光阑内外半径和衰减因子对环带光阑圆形艾里光束(CAB)自聚焦特性的影响。结果表明,控制环带光阑内外半径,可以增加CAB第一个自聚焦峰光强且抑制传播后续聚焦峰光强;和无光阑时相比,添加环带硬边光阑有聚焦峰光强在不同的衰减因子下普遍增强的优点。因此,该方法在光操控粒子方面具有潜在的应用。

Outer and inner radius of hard-edge annular aperture as well as decay factor as main effection factors for the abruptly autofocusing property of circular Airy beam (CAB) carrying hard-edge annular aperture are all considered. Conclusion has been achieved that, putting hard-edge annular aperture on CAB will enhance its first autofocusing peak intensity and suppresses the further autofocusing peak intensity, and its first autofocusing peak intensity will also be generally increased under the condition of different decay factors. These conclusions have potential applications in particle manipulation.