Open AccessElectromagnetic dipole coupling mechanism in layered terahertz metamaterials
Author(s) -
Jinhyuk Choi,
Hyunseung Jung,
Ho-Jin Lee,
Hyunyong Choi
Publication year - 2013
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.016975
Subject(s) - metamaterial , split ring resonator , dipole , resonator , terahertz radiation , coupling (piping) , optics , magnetic dipole , electromagnetic radiation , physics , resonance (particle physics) , bandwidth (computing) , optoelectronics , materials science , atomic physics , telecommunications , computer science , quantum mechanics , metallurgy
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.