single-layer transmission-type metasurfaces are proposed to generate a converged vortex beam and vortex beams with different topological charges. A new metasurface design is used to generate the vortex beam, in which the required accumulated phase di
涡流
Vortex是一个专注于函数式编程的.Net标准框架。
使用Monadic框架在C＃上编写优雅且可验证的解决方案，它有两种形式：
从符号
await
// Try to create an order
from maybeOrder in
from order in _orderRepository . GetByIdAsync ( orderId )
select OrderBehavior . TryCheckout ( order )
//
The generation and propagation dynamics of multiple optical vortices hosted in a Gaussian beam are experimentally demonstrated by use of the computer-generated holography. Fluid-like motions of the multi-vortex beam are observed owing to the helical
