光学
几何相位
相(物质)
数值孔径
物理
光圈(计算机存储器)
材料科学
波长
声学
量子力学
作者
Qinmiao Chen,Yudong Li,Yu Han,Duo Deng,Dahai Yang,Ying Zhang,Yi Liu,Jianmin Gao
出处
期刊:Applied Optics
[The Optical Society]
日期:2018-09-17
卷期号:57 (27): 7891-7891
被引量:19
摘要
A high numerical aperture multifocal metalens was proposed based on well-designed Pancharatnam-Berry phase optical elements. Both circularly and linearly polarized incident lights could be tightly focused into diffraction-limited focal spots. Right and left circularly polarized focal spots could be realized simultaneously by illuminating a linearly polarized beam. The highest numerical aperture reached to 0.84 with full width at half-maximum of 263 nm. Moreover, we also presented a metalens whose optical elements are hybrid arranged and the metalens can realize spin-independent focusing with a numerical aperture of 0.8. The presented metalens has significant potential applications in particles manipulation and high-resolution imaging.
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