• 文献标题:   Tunable graphene quadrupole dark mode based ultranarrow Fano resonance in asymmetric hybrid metamaterial
  • 文献类型:   Article
  • 作  者:   ZHU Q, CHEN YT, HUANG JH, HUANG Z, DU W, YAN ZD, WANG JP
  • 作者关键词:   graphene, quadrupole dark mode, ultranarrow fano resonance, sensing
  • 出版物名称:   OPTICS COMMUNICATIONS
  • ISSN:   0030-4018 EI 1873-0310
  • 通讯作者地址:  
  • 被引频次:   3
  • DOI:   10.1016/j.optcom.2022.127927 EA JAN 2022
  • 出版年:   2022

▎ 摘  要

We numerically demonstrate the ultranarrow high-order Fano resonance generated by the plasmonic coupling between graphene quadrupole dark mode and metallic bright magnetic dipole mode due to structural symmetry breaking effect in asymmetric hybrid metamaterials, consisting of periodic arrays of graphene nanoribbon and gold split-ring resonators. The graphene quadrupole Fano curve presents an ultranarrow lineshape with quality (Q) factor of 40. The proposed metamaterial shows the obvious dependence of the structural parameters and Fermi energy. Our designed asymmetric hybrid metamaterials shows a high sensitivity of 4.2 mu m/RIU and figure of merit (FOM) of 30, which could pave way for in label-free biomedical sensing.