西北师范大学学报（自然科学版）2018，Vol.54Issue(2)：49-53,5.DOI:10.16783/j.cnki.nwnuz.2018.02.009
"π"型双频负折射率超材料
A"π-shaped"metamaterial with dual-band negative refraction index
摘要
Abstract
In this paper,a kind of π-shaped visible electromagnetic metamaterial on the basis of effective medium theory is designed.The simulated results demonstrate that the proposed metamaterial can generate resonances around 550.4 THz and 577.8 T Hz,with the permittivity and permeability being negative simultaneously.The negative refraction performance of the metamaterial is confirmed by using a wedge-shaped array composed of π-shaped unit cells.Further simulations reveal that the electromagnetic responses of the proposed metamaterial are closely related with the twist angle between the front and back π-shaped patterns.This kind of π-shaped metamaterial exhibits low loss feature,which overcomes the draw back of high losses existing in some other fishnet metamaterials and also provides a new model for designing multiband visible electromagnetic metamaterials.关键词
负介电常数/负磁导率/负折射/多频带/电磁超材料Key words
negative permittivity/negative permeability/negative refraction/multiband/electromagnetic metamaterials分类
数理科学引用本文复制引用
陈怀军,赵文霞,宋坤.."π"型双频负折射率超材料[J].西北师范大学学报（自然科学版）,2018,54(2):49-53,5.基金项目
国家自然科学基金资助项目(11764033,21561027,61601375) （11764033,21561027,61601375）
宁夏自治区自然科学基金资助项目(NZ17253) （NZ17253）
宁夏高等学校科学研究项目(NGY2016173) （NGY2016173）
宁夏师范学院2017年本科教学工程资助项目 （）
