Vaveliuk Pablo, Lencina Alberto, Rodrigo Jose A, Martinez Matos Oscar
Opt Lett. 2014 Apr 15;39(8):2370-3. doi: 10.1364/OL.39.002370.
In this Letter a new class of light beam arisen from the symmetrization of the spectral cubic phase of an Airy beam is presented. The symmetric Airy beam exhibits peculiar features. It propagates at initial stages with a single central lobe that autofocuses and then collapses immediately behind the autofocus. Then, the beam splits into two specular off-axis parabolic lobes like those corresponding to two Airy beams accelerating in opposite directions. Its features are analyzed and compared to other kinds of autofocusing beams; the superposition of two conventional Airy beams having opposite accelerations (in rectangular coordinates) and also to the recently demonstrated circular Airy beam (in cylindrical coordinates). The generation of a symmetric Airy beam is experimentally demonstrated as well. Besides, based on its main features, some possible applications are also discussed.
在这封信中，提出了一类由艾里光束光谱立方相位对称化产生的新型光束。对称艾里光束展现出独特的特性。它在初始阶段以单个中心瓣传播，该中心瓣会自动聚焦，然后在自动聚焦点之后立即坍缩。接着，光束分裂成两个镜面反射的离轴抛物瓣，类似于对应于沿相反方向加速的两个艾里光束的抛物瓣。分析了其特性，并与其他类型的自动聚焦光束进行了比较；还与具有相反加速度（在直角坐标系中）的两个传统艾里光束的叠加以及最近展示的圆形艾里光束（在柱坐标系中）进行了比较。还通过实验证明了对称艾里光束的产生。此外，基于其主要特性，还讨论了一些可能的应用。
