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http://dx.doi.org/10.4283/JKMS.2017.27.2.049

Magnetic Resonance and Electromagnetic Wave Absorption of Metamaterial Absorbers Composed of Split Cut Wires in THz Frequency Band  

Ryu, Yo-Han (Department of Advanced Materials Engineering, Chungbuk National University)
Kim, Sung-Soo (Department of Advanced Materials Engineering, Chungbuk National University)
Publication Information
Journal of the Korean Magnetics Society / v.27, no.2, 2017 , pp. 49-53 More about this Journal
Abstract
Metamaterials composed of split cut wire (SCW) on grounded polyimide film substrate have been investigated for the aim of electromagnetic wave absorbers operated in THz frequency band. Reflection loss and current density distributions are numerically simulated with variations of the SCW geometries using the commercial software. The minimum reflection loss lower than -20 dB has been identified at 5.5~6.5 THz. The simulated resonance frequency and reflection loss can be explained on the basis of the circuit theory of an inductance-capacitance (L-C) resonator. Dual-band absorption can be obtained by arrangement of two SCWs of different length on the top layer of the grounded substrate, which is due to multiple magnetic resonances by scaling of SCWs. With increasing the side spacing between SCWs, a more enhanced absorption peak is observed at the first resonance frequency that is shifted to a lower frequency.
Keywords
metamaterials; absorbers; terahertz; electric properties; magnetic properties;
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