Sub-wavelength focusing based on all-dielectric polarization-independent metalens

被引：3

作者：

Zhao, Wei ^{[1
,2
]}

Li, Xingyi ^{[1
,3
]}

Li, Siqi ^{[1
,3
]}

Ge, Zhiqiang ^{[1
,3
]}

Liu, Mulong ^{[1
,3
]}

Li, Zhongyu ^{[1
,3
]}

Du, Shujian ^{[1
,3
]}

机构：

[1] Chinese Acad Sci, XIOPM, State Key Lab Transient Opt & Photon, Xian 710119, Shaanxi, Peoples R China

[2] Shaanxi Normal Univ, Coll Phys & Informat Technol, Xian 710119, Shanxi, Peoples R China

[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 2018年 / 32卷 / 29期

关键词：

Lenses; metamaterials; polarization; BROAD-BAND; ULTRA-THIN; REFLECTION; OPTICS; PLANAR;

D O I：

10.1142/S0217979218503216

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have proposed an all-dielectric polarization-independent metalens, which can be used for sub-wavelength focusing. The phase discontinuity of transmission light is produced by varying the diameter of the nanopillar. In this way, the incident light can be focused into sub-wavelength spot. Besides, finite-difference time-domain results show that near diffraction limit focusing is realized for the wavelength from 580 nm to 750 nm, which means the proposed metalens possesses a broad operation bandwidth. This all-dielectric metalens features polarization independent and broad bandwidth, and thus promises great potential for the applications of nanolithography, dense storage and biophotonics.

引用

页数：8

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