Graphene-based dual-functional chiral metamirror composed of complementary 90° rotated U-shaped resonator arrays and its equivalent circuit model

被引:11
作者
Asgari, Somayyeh [1 ]
Fabritius, Tapio [1 ]
机构
[1] Univ Oulu, Fac Informat Technol & Elect Engn, Optoelect & Measurement Tech Res Unit, Oulu, Finland
关键词
BROAD-BAND; TUNABLE MULTIBAND; PERFECT; ABSORPTION; ABSORBER; METAMATERIAL; DIFFRACTION; DICHROISM; DESIGN;
D O I
10.1038/s41598-021-03457-8
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
An equivalent circuit model (ECM) using a MATLAB code to analyze a tunable two-layered graphene-based chiral dual-function metamirror, is proposed in this work. The investigated metastructure is composed of complementary U-shaped graphene resonator arrays in the terahertz (THz) region. The ECM analysis could be used for any two-layered chiral metastructure for any frequencies, containing resonators with a thickness less than lambda/50. The characteristics of the proposed tunable metamirror were analyzed numerically using the finite element method (FEM) in CST Software to verify the ECM analysis. The proposed metamirror can be used in polarization-sensitive devices in the THz region with simpler biasing without a need for ion gels or similar. It works as a broadband TE and multiband (four bands) TM mirror in the 0.3-4.5 THz bandwidth with a strong linear dichroism (LD) response (up to 96%). The designed mirror is a dynamically tunable, dual-functional structure, requiring only 90 degrees rotation of the incident electromagnetic fields to switch between broadband and multiband spectral behavior making it a promising candidate for future THz intelligent systems. The proposed ECM is in agreement with the FEM results. The ECM analysis provides a simple, fast, and effective way to understand the metamirror's behavior and guides for the design and analysis of graphene-based chiral metastructures in the THz region.
引用
收藏
页数:12
相关论文
共 53 条
  • [1] Equivalent circuit model of graphene chiral multi-band metadevice absorber composed of U-shaped resonator array
    Asgari, Somayyeh
    Fabritius, Tapio
    [J]. OPTICS EXPRESS, 2020, 28 (26) : 39850 - 39867
  • [2] Controllable terahertz cross-shaped three-dimensional graphene intrinsically chiral metastructure and its biosensing application
    Asgari, Somayyeh
    Granpayeh, Nosrat
    Fabritius, Tapio
    [J]. OPTICS COMMUNICATIONS, 2020, 474
  • [3] Tunable circular conversion dichroism and asymmetric transmission of terahertz graphene metasurface composed of split rings
    Asgari, Somayyeh
    Rahmanzadeh, Mahdi
    [J]. OPTICS COMMUNICATIONS, 2020, 456 (456)
  • [4] High-efficiency tunable plasmonically induced transparency-like effect in metasurfaces composed of graphene nano-rings and ribbon arrays and its application
    Asgari, Somayyeh
    Shokati, Elnaz
    Granpayeh, Nosrat
    [J]. APPLIED OPTICS, 2019, 58 (13) : 3664 - 3670
  • [5] Deep Learning-Based Multimodal Data Fusion: Case Study in Food Intake Episodes Detection Using Wearable Sensors
    Bahador, Nooshin
    Ferreira, Denzil
    Tamminen, Satu
    Kortelainen, Jukka
    [J]. JMIR MHEALTH AND UHEALTH, 2021, 9 (01):
  • [6] A Correlation-Driven Mapping For Deep Learning application in detecting artifacts within the EEG
    Bahador, Nooshin
    Erikson, Kristo
    Laurila, Jouko
    Koskenkari, Juha
    Ala-Kokko, Tero
    Kortelainen, Jukka
    [J]. JOURNAL OF NEURAL ENGINEERING, 2020, 17 (05)
  • [7] Barron L. D., 2004, Molecular Light Scattering and Optical Activity, V2nd
  • [8] Analytical design of tunable multi-band terahertz absorber composed of graphene disks
    Biabanifard, Mohammad
    Asgari, Somayyeh
    Biabanifard, Sadegh
    Abrishamian, Mohammad Sadegh
    [J]. OPTIK, 2019, 182 : 433 - 442
  • [9] Bonaccorso F, 2010, NAT PHOTONICS, V4, P611, DOI [10.1038/nphoton.2010.186, 10.1038/NPHOTON.2010.186]
  • [10] Theoretical study of tunable chirality from graphene integrated achiral metasurfaces
    Cao, Tun
    Li, Yang
    Zhang, Xinyu
    Zou, Yang
    [J]. PHOTONICS RESEARCH, 2017, 5 (05) : 441 - 449