Utilising graphene antidots for implementation of a broadband terahertz absorber

作     者：Jamalpoor, Kamal Zarifkar, Abbas 

作者机构：Shiraz Univ Sch Elect & Comp Engn Shiraz Iran 

出 版 物：《MICRO & NANO LETTERS》 (Micro. Nano. Lett.)

年 卷 期：2018年第13卷第12期

页      面：1712-1715页

核心收录：

学科分类：080903[工学-微电子学与固体电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

主　　题：electromagnetic wave absorption refractive index graphene surface conductivity resonators dielectric polarisation polymers terahertz materials broadband terahertz absorber graphene antidots array polyethylene dielectric layer graphene sheet antidot resonator geometrical dimensions graphene conductivity parameters refractive index absorption transmission lines Au substrate dielectric layer height broadband matching technique Au C 

摘      要：In this work, a broadband absorber is designed for application in the terahertz region using graphene antidots array. The proposed absorber consists of an Au substrate, a polyethylene dielectric layer and a graphene sheet with antidot resonators. The geometrical dimensions of the antidot resonator and its array period, the graphene conductivity parameters and the dielectric layer height and refractive index are the parameters that determine the characteristics of the absorber such as bandwidth, centre frequency, the amount of the absorption and sensitivity to the incident wave incident angle and polarisation. The circuit theory and a broadband matching technique of the transmission lines are utilised in some steps of the design approach. Moreover, some rules of thumb are extracted for the absorber design in different frequencies. The designed absorber has a normalised bandwidth of 80% in the terahertz region, low sensitivity to incident angle and an absorption peak of 100%.