具有预设计轨迹的非傍轴加速光束的闭合表达式
Closed-form expressions for nonparaxial accelerating beams with pre-engineered trajectories
摘要:
在这封信中,我们提出了一个通用的实空间方法产生的非傍轴加速光束具有任意预定义的凸轨迹。我们的结果导致封闭形式的表达式所需的相位在输入平面。我们提出了这样的封闭形式的各种焦散曲线的结果:除了圆形,椭圆形和抛物线,我们第一次发现一般的幂律和指数轨迹。此外,通过改变初始振幅,我们可以沿着焦散设计不同的强度分布。
英文摘要:
In this letter, we propose a general real-space method for the generation of nonparaxial accelerating beams with arbitrary predefined convex trajectories. Our results lead to closed-form expressions for the required phase at the input plane. We present such closed-form results for a variety of caustic curves: besides circular, elliptic, and parabolic, we find for the first time general power-law and exponential trajectories. Furthermore, by changing the initial amplitude we can design different intensity profiles along the caustic.
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