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Independently tunable electromagnetically induced transparency effect and dispersion in a multi-band terahertz metamaterial.

Abstract：

:In this article, we experimentally and numerically investigate a planar terahertz metamaterial (MM) geometry capable of exhibiting independently tunable multi-band electromagnetically induced transparency effect (EIT). The MM structure exhibits multi-band EIT effect due to the strong near field coupling between the bright mode of the cut-wire (CW) and dark modes of pair of asymmetric double C resonators (DCRs). The configuration allows us to independently tune the transparency windows which is challenging task in multiband EIT effect. The independent modulation is achieved by displacing one DCR with respect to the CW, while keeping the other asymmetric DCR fixed. We further examine steep dispersive behavior of the transmission spectra within the transparency windows and analyze slow light properties. A coupled harmonic oscillator based theoretical model is employed to elucidate as well as understand the experimental and numerical observations. The study can be highly significant in the development of multi-band slow light devices, buffers and modulators.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Sarkar R,Ghindani D,Devi KM,Prabhu SS,Ahmad A,Kumar G

doi

10.1038/s41598-019-54414-5

subject

Has Abstract

pub_date

2019-12-02 00:00:00

pages

18068

issue

1

issn

2045-2322

pii

10.1038/s41598-019-54414-5

journal_volume

9

pub_type

杂志文章

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