Ultra-Broadband THz Antireflective Coating with Polymer Composites

doi:10.3390/polym9110574

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017年

	Ultra-Broadband THz Antireflective Coating with Polymer Composites
	Cai, B; Chen, HT; Xu, GJ; Zhao, HW; Sugihara, O
刊名	POLYMERS
	2017
卷号	9 期号:11 页码:-
关键词	Terahertz Frequency-range High Refractive-index Fabrication Technology
ISSN号	2073-4360
DOI	10.3390/polym9110574
文献子类	期刊论文
英文摘要	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.
WOS关键词	TERAHERTZ FREQUENCY-RANGE ; HIGH REFRACTIVE-INDEX ; FABRICATION ; TECHNOLOGY
语种	英语
WOS记录号	WOS:000416807600027
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/28888]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017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):-.