Choi Jeongmook, Jung Hyunseung, Lee Hojin, Choi Hyunyong
School of Electrical and Electronic Engineering, Yonsei University, Seoul 120-749, South Korea.
Opt Express. 2013 Jul 15;21(14):16975-9. doi: 10.1364/OE.21.016975.
Interplay between adjacent dipoles is an experimental priori for designing artificially-engineered structure because the dipole coupling is one critical factor for determining the electromagnetic response in metamaterials. Although numerous investigations have been performed to study the coupling effect of the split-ring resonator (SRR), the interlayer dipole coupling of its complementary SRR, called C-SRR, has been largely unexplored. Here, we present experimental and theoretical investigations on the electromagnetic coupling effect in the two stacks of layered C-SRR structures. By adjusting the relative lateral distance between the two-dimensionally stacked meta-structures, we observe that the confined magnetic dipole plays an important role in determining the resonance frequency and the bandwidth broadening of the C-SRR, exhibiting an exactly opposite behavior to the SRR structure. Our investigation provides experimental basis for developing frequency tunable three-dimensional metamaterial devices.
相邻偶极子之间的相互作用是设计人工工程结构的一个实验前提，因为偶极子耦合是决定超材料电磁响应的一个关键因素。尽管已经进行了大量研究来探讨裂环谐振器（SRR）的耦合效应，但其互补SRR（称为C-SRR）的层间偶极子耦合在很大程度上仍未得到探索。在此，我们对两层堆叠的分层C-SRR结构中的电磁耦合效应进行了实验和理论研究。通过调整二维堆叠超结构之间的相对横向距离，我们观察到受限磁偶极子在决定C-SRR的共振频率和带宽展宽方面起着重要作用，表现出与SRR结构完全相反的行为。我们的研究为开发频率可调谐三维超材料器件提供了实验依据。
