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中文摘要：
具有动态可调特性的红外吸收器在红外开关、传感器以及红外探测等方面具有重大的应用前景。然而,传统材料并不能透过红外电磁波,更不具备理想的动态可调性。本文利用CST三维电磁场仿真软件设计的超材料红外吸收器,能够实现在中红外波段对特定频率选择透过和透射强度可调的效果。仿真结果显示,在272.8THz,686.2 THz和1407.7 THz频率处出现频率选择透过特性;随着模型中金属薄膜的厚度的增大,透射峰位发生蓝移,同时峰值随之减小;随着方孔长度和宽度的增大,透射峰位红移,透射强度增大。此外,该研究可以为红外波段功能器件在实际应用和生产中提供有意义的参考。
英文摘要：
Infrared（IR） absorber with dynamically tunable bandwidth possesses huge application value in the field of switches,sensors and IR detection. However, as for traditional materials, IR wave can not pass through them, let alone have the ideal dynamic tunableness. In this paper, a metamaterial infrared absorber was designed by using 3D electromagnetic field simulation software of CST, which can select the specific frequency and adjust the transmission intensity in mid-infrared band. Simulation results show that frequency selectivity appears in 272.8 THz, 686.2 THz and 1407.7 THz. And with the increase in the thickness of the metal film of the model, the transmission peaks will have a blue-shift and the peak intensity will decrease. Meanwhile, with the rise in the length and width of the square hole, the transmission peaks will have a red-shift and the peak intensity will increase. The research could provide some meaningful guides in practical application of infrared functional devices.
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