Strong Coupling and Electromagnetically Induced Transparency in Multiple-BIC-Driven Metasurfaces

Photonic quasi-bound states in the continuum (quasi-BICs) provide an excellent platform for strong light-matter interactions in nanophotonics. In this work, we numerically and experimentally demonstrate that the Si nanorod dimer metasurface offers a new paradigm for realizing multiple wavelength-stabilized and quality-factor-tunable quasi-BICs, through a unique symmetry breaking method that does not alter the metasurface volume. A pronounced electromagnetically induced transparency (EIT) effect, exhibiting a group time delay of 6.7 ps, and strong coupling accompanied by characteristic anticrossing Rabi splitting are realized based on the hybridization between a bright mode and the neighboring quasi-BIC within…

• NN
  National Natural Science Foundation of China

  Awards: 12304420, 12264028, 12404359, 61805064
• FU
  Fudan University

  Award: YSXM03020230014
• NS
  Natural Science Foundation of Jiangxi Province

  Award: 20232BAB201040
• NS
  Natural Science Foundation of Anhui Province

  Award: 2308085MA24
• FR
  Fundamental Research Funds for the Central Universities

  Award: JZ2024HGTB0220