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Materials 2019, 12(6), 841; https://doi.org/10.3390/ma12060841

Design of Broad Stopband Filters Based on Multilayer Electromagnetically Induced Transparency Metamaterial Structures

1
School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
2
Beijing Research Center for Information Technology in Agriculture, Beijing 100097, China
*
Authors to whom correspondence should be addressed.
Received: 15 January 2019 / Revised: 9 March 2019 / Accepted: 11 March 2019 / Published: 13 March 2019
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Abstract

Broad stopband filters are proposed, based on multilayer electromagnetically induced transparency (EIT) metamaterial structures. The single EIT metamaterial consists of a U-shaped resonator and a strip on a polyimide substrate. The EIT-like spectral feature is firstly utilized to achieve stopband filters by properly coupling two layers of EIT structure. Influences of different rotation angles on the transmission properties of the two-layer EIT structure are investigated. It is found the wider low-transmission band can be obtained for the Transverse Magnetic (TM) polarization when the two EIT metal structures are vertical to each other. Furthermore, the bandwidth of the stopband can be controlled by increasing layers of the EIT structures with the proper architectural design. The design using a coupling effect of multi EIT-like resonances in the metamaterial would provide a new method for broad stopband filters in highly integrated optical circuits. View Full-Text
Keywords: stopband filter; electromagnetically induced transparency; multi-layer stopband filter; electromagnetically induced transparency; multi-layer
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Liu, Z.; Qi, L.; Shah, S.M.A.; Sun, D.; Li, B. Design of Broad Stopband Filters Based on Multilayer Electromagnetically Induced Transparency Metamaterial Structures. Materials 2019, 12, 841.

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