无衍射艾里光束的横向自加速特性

Transverse acceleration property of non-diffracting Airy beam

无衍射艾里光束的横向自加速特性使得光束在自由空间沿弯曲路径进行传输成为可能。利用一维傍轴波动方程对新型无衍射艾里光束的横向自加速特性进行了仿真研究。研究表明,当入射波长一定时,艾里光束的横向加速度大小与传播距离呈正比关系,而与任意横向尺度的大小呈反比关系。同时,利用波印廷矢量对艾里光束横向自加速的内在机理进行了研究。最后,利用通用型液晶空间光调制器对二维艾里光束的产生和横向自加速特性进行了实验研究,所得结果与仿真计算结果取得了较好的一致性。

The transverse acceleration property of Airy beams makes it possible for beams to propagate along the curved trajectories in free space.The transverse acceleration propagation property of the new-type Airy beams was studied by utilizing the one-dimensional paraxial wave equation.The simulation results show that the transverse acceleration of Airy beam is relevant to the propagation distance and arbitrary transverse scale when the wavelength keeps constant.The transverse acceleration will become larger when the propagation distance becomes longer and the transverse scale becomes smaller.The Poynting vector was utilized to analyze the mechanism of accelerating property of Airy beams.Moreover,the twodimensional finite Airy beam was generated by utilizing the universal liquid crystal spatial light modulator,and the experimental study on the transverse acceleration property of Airy beam was also carried out.The experimental results coincide well with the simulation results.