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A. ELAKKIYA1,* , K. A. KARTHIGEYAN2, E. MANIKANDAN3, S. RADHA2
- Department of ECE, Saveetha Engineering College, Chennai – 602105, India
- Department of ECE, Sri Sivasubramaniya Nadar College of Engineering, Chennai – 603110, India
- School of Electronics Engineering, Vellore Institute of Technology, Chennai Campus – 600127, India
Terahertz (THz) Metamaterial Absorbers (MMAs) have gained attention for applications like imaging, sensing and spectroscopy. In specific, there is a need for designing a multi-band MMA. In this study, a new MMA is proposed and designed to operate at seventeen distinct frequencies using a single resonator concept. It is designed to achieve a bandwidth of 440 GHz in the range (750-1190 GHz). By optimizing the top metallic patch geometrical parameter (r2) eleven-/fourteen-/fifteen-/sixteen-band MMAs have been obtained. The proposed has stable response for various incident angles of up to 900 and also polarization independent characteristics. For understanding the underlying mechanism of multi-band operation the electric and magnetic field distributions are analysed. The proposed structure has achieved a sharp narrow-band absorption in the desired resonances. In terahertz regime, this is the first of kind to achieve seventeen-band absorber with better absorption characteristics using a simple planar structure. This kind of structure finds importance in sensing and imaging applications..
Seventeen-band MMA, Polarization and incident angle insensitive, Terahertz.
Submitted at: Jan. 10, 2022
Accepted at: Oct. 5, 2022
A. ELAKKIYA, K. A. KARTHIGEYAN, E. MANIKANDAN, S. RADHA, Terahertz seventeen-band metamaterial absorber based on sunflower-typed structure, Journal of Optoelectronics and Advanced Materials Vol. 24, Iss. 9-10, pp. 426-432 (2022)
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