11 September 2013 Multiplex-bands spectral characteristics of infrared perfect absorber metamaterials
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The multiplex-bands absorption of sandwich-structure metamaterials based metal- dielectric- metal scheme are investigated numerically and experimentally. The optical properties of cross-shape antenna perfect absorber metamaterials are demonstrated in mid-IR electromagnetic (EM) wave. The dual-band perfect absorber with polarization independence is observed under normal incidence. In order to understand the EM properties of dual-band perfect absorber, the plasmonic excitation and the induced current distribution were clarified for both peaks. The simulation results clearly show that the absorption bands are independently governed by the size of each part of the patterned nanostructure. The repositioning of two near-perfect absorption peaks possesses a linear relationship. This allows for a flexible reconfigurability over the entire near-infrared regime. Furthermore, in order to obtain multiplex-bands spectral absorption response, two cross-shape antennas are connected to form one dumbbell antenna. The three perfect-absorption peaks can be controlled by the individual dipole antenna elements in the conditions of polarization incident EM wave.
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Yongqian Li, Yongqian Li, Lei Su, Lei Su, Binbin Wang, Binbin Wang, Yongjun Guo, Yongjun Guo, Zhenyu Zhu, Zhenyu Zhu, Zili Zhou, Zili Zhou, "Multiplex-bands spectral characteristics of infrared perfect absorber metamaterials", Proc. SPIE 8806, Metamaterials: Fundamentals and Applications VI, 880612 (11 September 2013); doi: 10.1117/12.2022624; https://doi.org/10.1117/12.2022624

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