Achromatic flat focusing lens based on dispersion engineering of spoof surface plasmon polaritons

被引：20

作者：

Yang, Jie ^{[1
]}

Wang, Jiafu ^{[1
]}

Feng, Mingde ^{[1
]}

Li, Yongfeng ^{[1
]}

Wang, Xinhua ^{[1
]}

Zhou, Xiaoyang ^{[2
]}

Cui, Tiejun ^{[2
]}

Qu, Shaobo ^{[1
]}

机构：

[1] Air Force Engn Univ, Coll Sci, Xian 710051, Shaanxi, Peoples R China

[2] Southeast Univ, State Key Lab Millimeter Waves, Nanjing 210096, Jiangsu, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2017年 / 110卷 / 20期

基金：

中国国家自然科学基金;

关键词：

BROAD-BAND; TRANSFORMATION-OPTICS; METASURFACES; METAMATERIALS; COMPENSATION; DESIGN; ARRAY;

D O I：

10.1063/1.4983831

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In this letter, we first analyze the dispersion relation for achromatic focusing and obtain the achromatic focusing conditions for discretized unit cells of flat lenses. Then, we propose to engineer the dispersion of spoof surface plasmon polaritons (SSPPs) to satisfy the achromatic focusing conditions. Metallic blades structures are utilized to achieve the linear dispersion response by tailoring the weak dispersion region of SSPPs. A broadband achromatic flat focusing lens (AFFL) is implemented with delicate combinations of the blade structures. A prototype was designed, fabricated, and measured. Both the simulated and experimental results demonstrate that the proposed AFFL can achieve achromatic focusing from 7.5 to 9.0 GHz under the normal incidence. Published by AIP Publishing.

引用

页数：5

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