High-harmonic-generation-inspired preparation of optical vortex arrays with arbitrary-order topological charges
High-harmonic-generation-inspired preparation of optical vortex arrays with arbitrary-order topological charges
复制标题
具有任意阶拓扑电荷的光学涡旋阵列的高次谐波产生启发制备
DOI：
10.3788/col201816.030501
复制
发表时间：
2018-03
影响因子：
3.5
通讯作者：
陈理想
中科院分区：
文献类型：
--
作者：
张武虹;陈理想
在拉盖尔-高斯（LG）模的高次谐波产生过程中，由于角动量守恒，拓扑电荷可以增加N倍。在这里，通过模仿高次谐波产生的效果，我们设计了一种简单的算法，用单个纯相位空间光调制器产生携带任意拓扑电荷的光学涡旋阵列。通过初步准备一个合适的低阶LG模式的同轴叠加，我们实验证明，嵌入的涡旋的拓扑电荷可以倍增，并根据需要转化为任意高阶，而阵列结构保持不变。我们的算法提供了一种简洁的方法来有效地操纵结构光束，并在光学显微操纵和遥感方面有希望。
In the process of high-harmonic generation with a Laguerre-Gaussian (LG) mode, it was well established that the topological charge could be of an N-fold increase due to angular momentum conservation. Here, by mimicking the effect of high-harmonic generation, we devise a simple algorithm to generate optical vortex arrays carrying arbitrary topological charges with a single phase-only spatial light modulator. By initially preparing a coaxial superposition of suitable low-order LG modes, we demonstrate experimentally that the topological charges of the embedded vortices can be multiplied and transformed into arbitrarily high orders on demand, while the array structure remains unchanged. Our algorithm offers a concise way to efficiently manipulate the structured light beams and holds promise in optical micromanipulation and remote sensing.