Wavelength selection type vortex light generator based on catenary structure

The invention provides a wavelength selection type vortex light generator based on a catenary structure. The wavelength selection type vortex light generator comprises a dielectric substrate and a metal catenary structure from bottom to top. According to the invention, the design is ingenious, the structure is simple, and different transmittances of circularly polarized incident light with different wavelengths can be realized by modulating the structural parameters of the catenary unit and arranging the required phases, so that the high-efficiency regulation and control of the wavelengths can be realized. The device can be used for designing metasurface functional devices for generating vortex light, beam splitting, deflection and the like. 本发明提供的是一种基于悬链线结构的波长选择型涡旋光发生器，包括至下而上的介质衬底和金属悬链线结构。本发明设计巧妙，结构简单，通过对悬链线单元结构参数的调制以及所需相位进行排列，可对不同波长的圆偏振入射光实现不同的透过率，从而达到对波长的高效率调控。本发明可用于设计产生涡旋光、分束、偏折等超表面功能器件。