Manipulating electromagnetic radiation of one-way edge states by magnetic plasmonic gradient metasurfaces

被引：0

作者：

HUABING WU ^{[1
]}

XIANG XI ^{[1
]}

XIMING LI ^{[1
]}

YIN POO ^{[1
]}

SHIYANG LIU ^{[2
]}

RUI-XIN WU ^{[1
]}

机构：

[1] School of Electronic Science and Engineering, Nanjing University

[2] Key Laboratory of Optical Information Detecting and Display Technology, Zhejiang Normal University

来源：

Photonics Research | 2022年 / 02期

基金：

中国国家自然科学基金;

关键词：

D O I：

暂无

中图分类号：

O53 [等离子体物理学]; O441 [电磁学];

学科分类号：

070204 ; 0809 ;

摘要：

We theoretically and experimentally demonstrate that magnetic plasmonic gradient metasurfaces(GMSs) can convert a spatially propagating wave to a one-way edge state or vice versa with high efficiency. Consisting of an array of ferrite rods with a rotation gradient introduced to the rod dimers in the unit cell, GMSs can covert an incident wave beam to a one-way edge state with efficiency over 77%, and almost fully radiate into free space from the one-way edge state. The phenomenon arises from the unidirectional coupling of the spatial electromagnetic wave with magnetic plasmonic GMSs, which is evidenced from the photonic band diagrams of the edge state.The one-way edge state can radiate to or be excited from air with different angles by either engineering the gradient of the GMSs or tuning the bias magnetic field. By designing magnetic plasmonic GMSs with more exquisite configurations, we can expect many more nonreciprocal properties, adding additional freedom in manipulating electromagnetic waves.

引用

页码：610 / 617

页数：8

共 56 条

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