论文标题
在非线性波混合与光学涡旋中观察三角晶格模式
Observation of triangular-lattice pattern in nonlinear wave mixing with optical vortices
论文作者
论文摘要
在光束中观察到三角晶格图案，这是由于光学涡流和三角形梁之间的空间交叉调制而产生的，经历了参数相互作用。研究了上下转换过程，并且转化光束的远场图像表现出三角形晶格。位点和晶格方向的数量由涡流束的拓扑充电确定。在下调过程中，晶格方向也可能受相结合的影响。观察到的交叉调制适用于各种空间场结构，并且可以在尚不可用的波长下取代固态设备。
A triangular-lattice pattern is observed in light beams resulting from the spatial cross modulation between an optical vortex and a triangular shaped beam undergoing parametric interaction. Both up- and down-conversion processes are investigated, and the far-field image of the converted beam exhibits a triangular lattice. The number of sites and the lattice orientation are determined by the topological charge of the vortex beam. In the down-conversion process, the lattice orientation can also be affected by phase conjugation. The observed cross modulation works for a large variety of spatial field structures, and could replace solid-state devices at wavelengths where they are not yet available.
