太赫兹辐射
法布里-珀罗干涉仪
光学
材料科学
宽带
吸收(声学)
超材料
微波食品加热
太赫兹光谱与技术
宽带
太赫兹间隙
光电子学
远红外激光器
物理
波长
太赫兹超材料
电信
激光器
计算机科学
作者
Zheqiang Zhong,Qiuxia Wu,Ling Fang,Bin Zhang
出处
期刊:Optics Letters
[The Optical Society]
日期:2023-10-06
卷期号:48 (21): 5591-5591
被引量:1
摘要
Broadband and efficient terahertz (THz) absorbers are crucial for various applications in sensing, imaging, detecting, and modulation. Although recent studies have reported a series of THz metamaterials for enhanced absorption, achieving high absorption across the entire ultrabroad terahertz band remains challenging. We propose a novel, to the best of our knowledge, method to design ultra-wideband terahertz absorbers using a water-filled Fabry–Perot cavity with continuously varying cavity length. Our design achieves over 90% absorption across an ultrabroad terahertz band ranging from 0.26 to 30 THz. Furthermore, the design method can be extended to the visible, infrared, and microwave regimes. We believe that our method will inspire further studies and applications of ultra-wideband absorbers.
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