超材料
谐振器
模式(计算机接口)
光电子学
光学
订单(交换)
物理
材料科学
计算机科学
财务
经济
操作系统
作者
Ben‐Xin Wang,Qin Xie,Guangxi Dong,Wei‐Qing Huang
标识
DOI:10.1088/1361-6463/aa934e
摘要
We present a rather simple metamaterial design consisted of only a rectangle-shape patch structure with a very small air strip on it to realize triple-band absorption at terahertz frequency. Results prove that three narrow-band absorption peaks are obtained at frequencies of 0.94 THz, 2.44 THz, and 2.85 THz, and the average absorption rates of the three peaks are 97.00%. The resonance at 0.94 THz is attributed to the fundamental mode (or 1-order) response of the metamaterial, while the last two modes are due to the two splitting modes of the 3-order response. The parameter changes of the small air strip in the rectangle-shape patch structure have large influence on the absorption performance of the metamaterial, in particular of the last two modes. Importantly, quad-band absorption can be obtained by introducing one more air strip in the rectangle-shape patch structure. It is found that the first resonance peak is derived from the 1-order response, whereas the last three modes stem from the three splitting modes of the 3-order response of the metamaterial. The combination of the 1-order resonance and multiple splitting modes of the 3-order response provides new design method to realize multiple-band light absorbers.
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