Ultra-Broadband THz Antireflective Coating with Polymer Composites
Cai, B; Chen, HT; Xu, GJ; Zhao, HW; Sugihara, O
2017
发表期刊POLYMERS
ISSN2073-4360
卷号9期号:11页码:-
文章类型期刊论文
摘要Achieving an ultra-broadband range is an essential development direction in terahertz techniques; however, a method to cover the full terahertz band by using a highly efficient antireflection (AR) coating that could greatly increase the efficiency of terahertz radiation is still lacking. It is known that structures possessing a graded-index profile can offer a broadband AR effect, and such structures have been widely used, especially in the visible range. In this paper, first, we tuned the refractive index of a cyclo-olefin polymer (COP) by using a TiO2 dopant, and a polymer-TiO2 composite with a refractive index of 3.1 was achieved. We then fabricated a surface-relief structure with a graded-index profile by using a hot-embossing method. The structure on the silicon substrate can provide an excellent AR effect, but the working band is still limited by its scale of sag and swell. To obtain an ultra-broadband AR effect, we then proposed a flat six-layer structure; a graded-index profile was obtained by casting epoxy-TiO2 composites in the order of a high index to lower indices. With a very well controlled refractive index and thickness of each layer, we achieved an AR effect of <2% in the ultra-broadband of 0.2-20 THz.
关键词Terahertz Frequency-range High Refractive-index Fabrication Technology
DOI10.3390/polym9110574
关键词[WOS]TERAHERTZ FREQUENCY-RANGE ; HIGH REFRACTIVE-INDEX ; FABRICATION ; TECHNOLOGY
收录类别SCI
语种英语
WOS记录号WOS:000416807600027
引用统计
被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/28888
专题中科院上海应用物理研究所2011-2018年
推荐引用方式
GB/T 7714
Cai, B,Chen, HT,Xu, GJ,et al. Ultra-Broadband THz Antireflective Coating with Polymer Composites[J]. POLYMERS,2017,9(11):-.
APA Cai, B,Chen, HT,Xu, GJ,Zhao, HW,&Sugihara, O.(2017).Ultra-Broadband THz Antireflective Coating with Polymer Composites.POLYMERS,9(11),-.
MLA Cai, B,et al."Ultra-Broadband THz Antireflective Coating with Polymer Composites".POLYMERS 9.11(2017):-.
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