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所属单位：[1]Univ Elect Sci & Technol China, State Key Lab Elect Films & Integrated Devices, Chengdu 610054, Peoples R China;[2]Univ Elect Sci & Technol China, Natl Key Lab Sci & Technol Commun, Chengdu 610054, Peoples R China

发表刊物：CHINESE PHYSICS B

关键字：terahertz; metamaterials; absorption; broadband

摘要：We design and experimentally demonstrate a broadband metamaterial absorber in the terahertz (THz) band based on a periodic array of aluminum (Al) squares with two different sizes. A thin silicon dioxide (SiO2) film rather than a conventional polyimide (PI) layer is used as a dielectric spacer to separate Al squares from the platinum (Pt) ground plane in our design, which significantly improves the design precision and the feasibility of the device fabrication. The combination of different sizes of Al squares gives rise to an absorption bandwidth of over 210 GHz with an absorption of over 90%. Our results also show that our device is almost polarization-insensitive. It works very well for all azimuthal angles with an absorption of beyond 80%.

文献类型：Article

卷号：23

期号：4

ISSN号：1674-1056

是否译文：否

CN号：11-5639/O4