High-Q Fano Resonance in Terahertz Frequency Based on an Asymmetric Metamaterial Resonator

We propose a planar metamaterial formed by four-strip metallic resonators, which can achieve high- Q Fano resonance in terahertz regime. This terahertz planar metamaterial supports a sharp Fano resonance at 0.81 THz with 25% transmission. The resonance bandwidth of the dip is 0.014 THz with the Q -f...

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Bibliographic Details
Published inNanoscale research letters Vol. 13; no. 1; pp. 294 - 7
Main Authors Xie, Qin, Dong, Guang-Xi, Wang, Ben-Xin, Huang, Wei-Qing
Format Journal Article
LanguageEnglish
Published New York Springer US 21.09.2018
Springer Nature B.V
SpringerOpen
Subjects
Asymmetry
Bandwidths
Chemistry and Materials Science
Fano
Fano resonance
Line shape
Materials Science
Metamaterial
Metamaterials
Molecular Medicine
Nano Express
Nanochemistry
Nanoscale Science and Technology
Nanotechnology
Nanotechnology and Microengineering
Q factors
Resonance
Resonators
Sensing
Signatures
Strip
Symmetry
Terahertz
Terahertz frequencies
Sensing
Terahertz
Metamaterial
Fano
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Summary:We propose a planar metamaterial formed by four-strip metallic resonators, which can achieve high- Q Fano resonance in terahertz regime. This terahertz planar metamaterial supports a sharp Fano resonance at 0.81 THz with 25% transmission. The resonance bandwidth of the dip is 0.014 THz with the Q -factor of 58. The interference between the bright mode and dark mode leads to the Fano line shape. This sharp Fano profile is explained by the electromagnetic theory of Fano resonance. Moreover, multiple Fano resonances can be realized by adding more strips into the original structure. As an example, two Fano dips with Q -factors of 61 and 65 can be achieved via a five-strip structure.
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ISSN:1931-7573
1556-276X
DOI:10.1186/s11671-018-2677-0