四类畴压电压磁超晶格的电磁波单方向透射

唐政华; 雷大军; 黄健全; 邱枫; 蒋纯志; 姚敏; 杨丽萍

doi:10.6054/j.jscnun.2016.05.021

四类畴压电压磁超晶格的电磁波单方向透射

(湘南学院电子信息与电气工程学院,郴州 423000)

基金项目:

湖南省高校科技创新团队项目（湘教通

2014

$2014$ 207号）;湖南省教育厅项目（14C1060）;郴州市科技计划项目（CZ2014042）

详细信息

作者简介:
唐政华，讲师，Email: tzh401@126.com.

通讯作者:
唐政华，讲师，Email: tzh401@126.com.

中图分类号: O482.3
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出版历程
- 收稿日期: 2016-03-11
- 刊出日期: 2016-07-24

Unidirectional Transmission Investigations of Electromagnetic Waves in Piezoelectric-Piezomagnetic Superlattices with Four Types of Domains in a Unit Cell

(School of Electronic Information and Electrical Engineering,Xiangnan University,Chenzhou 423000,China)

摘要

摘要: 压电压磁超晶格中畴排列方式的不同导致其性质发生改变. 文中基于四类畴压电压磁超晶格结构，将1个周期内畴的排布方式分为（+P,-P,+M,-M）、（+P,-P,+P,+M）和（+P,+M,-M,+M）3种. 对于（+P,－P,+P,-M）结构，〖AK-D9〗=2719附近存在1个单方向频率通道，相对带宽约为326%. 对于（+P,－P,+P,+M）结构，〖AK-D9〗=2374附近通道2的最大群速度指数可达ng=69 6951. 电磁波通过长为1 cm的超晶格的延迟时间约为232 s. 对于（+P,+M,－M,+M）结构，通过外加电场反转极化可实现快波和慢波的切换，群速度指数的改变量可达525, 可用于构造单方向电磁波导和群速度延迟器件.
- 四类畴压电压磁超晶格 /
- 耦合极化激元带结构 /
- 单方向频率通道 /
- 群速度指数
Abstract: The different arrangements of domains of piezoelectric-piezomagnetic superlattices lead to different pro-perties. Piezoelectric-piezomagnetic superlattices with four types of domains in a unit cell (FPPS) are studied in detail in this work; the arrangements of a period are divided into 3 types, that is (+P,-P,+M,-M), (+P,-P,+P,〖JP2〗+M) and (+P,+M,-M,+M). For the FPPS with 〖JP2〗(+P,-P,+M,-M) domains, there is a frequency channel allowing one-way transmission of forward electromagnetic waves, and the relative bandwidth is about 326%. For the FPPS with (+P,－P,+P,+M),〖JP〗 the maximum group velocity index ngreaches 69 6951 in the frequency channel around 〖DD(-1.7mm〗-〖DD)〗=2374. The delay time is about 232 s when electromagnetic waves pass through the FPPS with the total length of 1 cm. For the FPPS with (+P,+M,－M,+M), the fast and slow waves can be switched when the electric field is applied to invert the polarization, and the change of group velocity index can reach 525. Thus, it is suggested that the FPPS can be applied to construct the one-way waveguide and slow wave delay devices.