光学
栅栏
材料科学
强度(物理)
传输(电信)
光学(聚焦)
衍射效率
光电子学
物理
计算机科学
电信
作者
Haoran Lv,Xiaoqing Lu,Yuansheng Han,Zhen Mou,Shuyun Teng
出处
期刊:Optics Letters
[The Optical Society]
日期:2019-05-09
卷期号:44 (10): 2518-2518
被引量:97
摘要
A multifocal metalens is proposed based on the optical metasurface consisting of subwavelength gratings etched on silver film. The larger transmission of grating makes the proposed metalens have high focusing efficiency, and the exquisite design of the metasurface enables the metalens to focus the light at multiple spots with the controllable intensity ratio. The intensity ratio of focal spots is controlled by adjusting grating structures. The numerical simulations give the good presentation, and the experiment measurement provides the favorable verification for the performance of the proposed multifocal metalens in light focusing and beam splitting. The advantages of the multifocal metalens, including simple design, compact structure, high efficiency, and the controllable focusing, are a benefit to its applications in optical integration and micromanipulation.
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