Handedness Dependent Electromagnetically Induced Transparency in Hybrid Chiral Metamaterials

Lei Kang, Zhi Hao Jiang, Taiwei Yue, Douglas H. Werner

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14 Scopus citations

Abstract

We provide the first experimental demonstration of the handedness dependent electromagnetically induced transparency (EIT) in chiral metamaterials during the interaction with circularly polarized waves. The observed chiral-sensitive EIT phenomena arise from the coherent excitation of a non-radiative mode in the component split ring resonators (SRRs) produced by the corresponding Born-Kuhn type (radiative) resonators that are responsible for the pronounced chirality. The coherent coupling, which is dominated by the bonding and antibonding resonances of the Born-Kuhn type resonators, leads to an extremely steep dispersion for a circularly polarized wave of predefined handedness. Accordingly, retrieved effective medium parameters from simulated results further reveal a difference of 80 in the group indices for left- and right-handed circularly polarized waves at frequencies within the EIT window, which can potentially result in handedness-sensitive pulse delays. These chiral metamaterials which enable a handedness dependent EIT effect may provide more degrees of freedom for designing circular polarization based communication devices.

Original languageEnglish (US)
Article number12224
JournalScientific reports
Volume5
DOIs
StatePublished - Jul 17 2015

All Science Journal Classification (ASJC) codes

  • General

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