摘要
由人工构造超表面所制成的电磁器件能够实现太赫兹频段的滤波、调控、传感、探测等功能,对太赫兹波在通信、成像领域的应用至关重要.基于纳米印刷技术设计制备了一种柔性透明双螺旋超表面,并利用该超表面构建了一款太赫兹旋转可调滤波器,通过旋转超表面实现太赫兹波透射率的有规律调谐.在旋转90°后,0.52 THz处的透射率由8%增至67%,而0.92 THz处的透射率由68%降至3%,实现调制深度大于88%的主动调控.并且,所提出的纳米印刷超表面具有超薄、柔性、可见光透明的优良性质,有利于太赫兹可调器件的小型化、轻量化及大面积制备.
Electromagnetic devices made of artificially constructed metasurfaces can achieve filtering,modulation,sensing,and detection functions in the terahertz frequency band,which is essential for the applications of terahertz waves in the fields of communication and imaging.We design and prepare a flexible and transparent double spiral metasurface based on nano-printing technology,and use the metasurface to construct a rotating tunable filter,which can achieve regular tuning of the terahertz wave transmittance by rotating the metasurface.After rotating 90°,the transmittance at 0.52 THz increases from 8%to 67%,and the transmittance at 0.92 THz decreases from 68%to 3%,thus realizing active tuning with modulation depth greater than 88%.Moreover,the proposed nano-printing metasurfaces have excellent properties of ultra-thinness,flexibility,and visible light transparency,which are conducive to the miniaturization,light-weight and large-area preparation of terahertz tunable devices.
作者
于博
庄书磊
王正心
王曼诗
郭兰军
李鑫煜
郭文瑞
苏文明
龚诚
刘伟伟
Yu Bo;Zhuang Shu-Lei;Wang Zheng-Xin;Wang Man-Shi;Guo Lan-Jun;Li Xin-Yu;Guo Wen-Rui;Su Wen-Ming;Gong Cheng;Liu Wei-Wei(Tianjin Key Laboratory of Micro-scale Optical Information Science and Technology,Institute of Modern Optics of Nankai University,Tianjin 300350,China;Suzhou Institute of Nano-Tech and Nano-Bionics(SINANO),Chinese Academy of Sciences,Suzhou 215123,China)
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2022年第11期333-340,共8页
Acta Physica Sinica
基金
国家重点研发计划(批准号:2018YFB0504400)资助的课题.
关键词
纳米印刷
超表面
太赫兹
旋转调谐
可见光透明
nano-printing
metasurfaces
terahertz
rotary tuning
visible light transparency
