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Ultra‐Broadband Wide‐Angle Terahertz Absorption Properties of 3D Graphene Foam
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2017-11-16 , DOI: 10.1002/adfm.201704363 Zhiyu Huang 1 , Honghui Chen 1 , Yi Huang 1 , Zhen Ge 1 , Ying Zhou 1 , Yang Yang 1 , Peishuang Xiao 1 , Jiajie Liang 1 , Tengfei Zhang 1 , Qian Shi 1 , Guanghao Li 1 , Yongsheng Chen 1
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2017-11-16 , DOI: 10.1002/adfm.201704363 Zhiyu Huang 1 , Honghui Chen 1 , Yi Huang 1 , Zhen Ge 1 , Ying Zhou 1 , Yang Yang 1 , Peishuang Xiao 1 , Jiajie Liang 1 , Tengfei Zhang 1 , Qian Shi 1 , Guanghao Li 1 , Yongsheng Chen 1
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As a next generation of detection technology, terahertz technology is very promising. In this work, a highly efficient terahertz wave absorber based on 3D graphene foam (3DG) is first reported. Excellent terahertz absorption property at frequency ranging from 0.1 to 1.2 THz is obtained owing to faint surface reflection and enormous internal absorption. By precise control of the constant properties for 3DG, the reflection loss (RL) value of 19 dB is acquired and the qualified frequency bandwidth (with RL value over 10 dB) covers 95% of the entire measured bandwidth at normal incidence, which far surpasses most reported materials. More importantly, the terahertz absorption performance of 3DG enhances obviously with increasing the incidence while majority of materials become invalid at oblique incidence, instead. At the incidence of 45°, the maximum RL value increases 50% from 19 to 28.6 dB and the qualified frequency bandwidth covers 100% of the measured bandwidth. After considering all core indicators involving density, qualified bandwidth, and RL values, the specific average terahertz absorption (SATA) property is investigated. The SATA value of 3DG is over 3000 times higher than those of other materials in open literatures.
中文翻译：
3D石墨烯泡沫的超宽带宽太赫兹吸收特性
作为下一代检测技术，太赫兹技术非常有前途。在这项工作中，首先报道了一种基于3D石墨烯泡沫（3DG）的高效太赫兹波吸收器。由于微弱的表面反射和巨大的内部吸收，在0.1到1.2 THz的频率范围内可获得出色的太赫兹吸收性能。通过精确控制3DG的恒定特性，可以获得19 dB的反射损耗（RL）值，合格的带宽（RL值超过10 dB）覆盖法向入射时整个测量带宽的95％，远远超过了报道最多的材料。更重要的是，3DG的太赫兹吸收性能随着入射率的增加而明显提高，而大多数材料在倾斜入射时变得无效。在45°入射角下 最大RL值从19 dB增至28.6 dB，增加了50％，合格的频率带宽覆盖了测量带宽的100％。在考虑了所有涉及密度，合格带宽和RL值的核心指标之后，研究了特定的平均太赫兹吸收（SATA）特性。3DG的SATA值比公开文献中其他材料的SATA值高3000倍以上。
更新日期：2017-11-16
中文翻译：
3D石墨烯泡沫的超宽带宽太赫兹吸收特性
作为下一代检测技术，太赫兹技术非常有前途。在这项工作中，首先报道了一种基于3D石墨烯泡沫（3DG）的高效太赫兹波吸收器。由于微弱的表面反射和巨大的内部吸收，在0.1到1.2 THz的频率范围内可获得出色的太赫兹吸收性能。通过精确控制3DG的恒定特性，可以获得19 dB的反射损耗（RL）值，合格的带宽（RL值超过10 dB）覆盖法向入射时整个测量带宽的95％，远远超过了报道最多的材料。更重要的是，3DG的太赫兹吸收性能随着入射率的增加而明显提高，而大多数材料在倾斜入射时变得无效。在45°入射角下 最大RL值从19 dB增至28.6 dB，增加了50％，合格的频率带宽覆盖了测量带宽的100％。在考虑了所有涉及密度，合格带宽和RL值的核心指标之后，研究了特定的平均太赫兹吸收（SATA）特性。3DG的SATA值比公开文献中其他材料的SATA值高3000倍以上。
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