Planar terahertz metamaterial with three-resonant frequencies
Chen Zhi (陈智)a, Zhang Ya-Xin (张雅鑫)b
a National Key Laboratory of Science and Technology on Communication, University of Electronic Science and Technology of China, Chengdu 611731, China; b Terahertz Science and Technology Research Center, University of Electronic Science and Technology of China, Chengdu 610054, China
Abstract In this paper, we study a three-resonant metamaterial with the combination of dual-resonant and single-resonant metamaterials. It presents a new method to design multi-resonant metamaterial which has a smaller dimension than the general symmetric and asymmetric multi-resonant metamaterials. Theoretical and experimental results show that the structure has three distinct absorption frequencies centering around 0.29 THz, 0.46 THz, and 0.92 THz, and each of them corresponds to a different resonant mode. Due to the well-separation of different resonances, this design provides a unique and effective method to construct multiband terahertz devices.
(Resonators, cavities, amplifiers, arrays, and rings)
Fund: Project supported by High-Tech Research and Development (863) Program of China (Grand No. 2011AA010201) and the National Natural Science Foundation of China (Contract No. 61001031).
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