论文标题
在紫外线中运行的逆设计的具有逆色的扁平透镜
An inverse designed achromatic flat lens operating in the ultraviolet
论文作者
论文摘要
我们展示了一种反设计的具有偏振的衍射视觉元件，即多级衍射透镜（MDL），通过数值模拟在UV光（250 nm -400 nm）的宽带范围内运行。 MDL的模拟平均轴心聚焦效率被优化为〜86％。我们还以传入的紫外线辐射的不同入射角度调查了轴心聚焦特性，以使MDL的整个视野为30度。模拟的平均离轴聚焦效率为〜67％，这是我们最好的了解的任何色彩或具有色彩的紫外线金属或衍射镜头的最多报告。设计的MDL由氮化硅组成。本文报告的工作将对轻质和紧凑的紫外线光学系统的微型化和整合有用。
We demonstrate an inverse designed achromatic, flat, polarization-insensitive diffractive optic element, i.e., multilevel diffractive lens (MDL), operating across a broadband range of UV light (250 nm - 400 nm) via numerical simulations. The simulated average on-axis focusing efficiency of the MDL is optimized to be as high as ~86%. We also investigate the off-axis focusing characteristics at different incident angles of the incoming UV radiation such that the MDL has a full field of view of 30 degrees. The simulated average off-axis focusing efficiency is ~67%, which is the highest reported till date for any chromatic or achromatic UV metalens or diffractive lens to the best of our knowledge. The designed MDL is composed of silicon nitride. The work reported herein will be useful for the miniaturization and integration of lightweight and compact UV optical systems.
