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基于非均匀硅基光栅的太赫兹选频反射器

Frequency-selective THz reflectors based on nonuniform silicon gratings

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摘要

亚波长尺寸介质光栅作为一种特殊的周期性结构已经在滤波器、反射器、耦合器和传感器等方面取得了重要的进展,其中非均匀光栅具有极大的设计自由度,使其可以在太赫兹波段具有宽频带、高反射的特点,而且不同的光栅常数和填充因子会引起光栅光谱的频移,从而实现选频反射.文章设计并加工了一种非均匀硅基光栅,并利用反射式太赫兹时域光谱系统测试其反射特性并对其选频特征进行有限元分析.结果表明该非均匀硅基光栅太赫兹选频反射器不但具有频带宽、反射率高等优点,还具有结构简单、体积小、易于加工制作和工艺容差大等特征.

Abstract

As a special periodic structure, sub wavelength gratings have made important progress in filters, reflectors, couplers, sensors and so on. Among them, the non-uniform grating has a great degree of design freedom, which enables it to have the characteristics of wide bandwidth and high reflectivity in terahertz range. Moreover, different grating constants and filling factors will lead to high selectivity in frequency spectrum, thus achieving tunable reflectors. In this paper, a non-uniform, silicon-based grating was designed and fabricated, and its reflection characteristics were measured by terahertz time-domain spectroscopy in reflection mode and calculated by finite element method. The results show that the non-uniform, high-selectivity, silicon-based grating not only has the advantages of wide frequency band and high reflectivity, but also has the characteristics of simple structure, small size, easy fabrication and large process tolerance.

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DOI:10.11972/j.issn.1001-9014.2019.06.009

所属栏目:Millimeter Wave and Terahertz Technology

基金项目:国家自然科学基金; 国家重点研发计划; 国家民委“中青年英才”培养计划; 中央民族大学大学生创新性实验计划; National Natural Science Foundation of China; the National Key R&D Program of China; The Young-talent Plan of State Affairs Commission; the Undergraduate Innoviative Test Program funded by Minzu University of China;

收稿日期:2019-02-16

修改稿日期:--

网络出版日期:2019-12-27

作者单位    点击查看

Teng ZHANG:School of Science, Minzu University of China, Beijing 0008, China
Li-Yan WANG:School of Science, Minzu University of China, Beijing 0008, China
Xin-Yuan WANG:School of Science, Minzu University of China, Beijing 0008, China
Bin CUI:School of Science, Minzu University of China, Beijing 0008, China
Yu-Ping YANG:School of Science, Minzu University of China, Beijing 0008, China

联系人作者:Yu-Ping YANG(ypyang@muc.edu.cn)

备注:国家自然科学基金; 国家重点研发计划; 国家民委“中青年英才”培养计划; 中央民族大学大学生创新性实验计划; National Natural Science Foundation of China; the National Key R&D Program of China; The Young-talent Plan of State Affairs Commission; the Undergraduate Innoviative Test Program funded by Minzu University of China;

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引用该论文

Teng ZHANG,Li-Yan WANG,Xin-Yuan WANG,Bin CUI,Yu-Ping YANG. Frequency-selective THz reflectors based on nonuniform silicon gratings[J]. Journal of Infrared and Millimeter Waves, 2019, 38(6): 733-738

Teng ZHANG,Li-Yan WANG,Xin-Yuan WANG,Bin CUI,Yu-Ping YANG. 基于非均匀硅基光栅的太赫兹选频反射器[J]. 红外与毫米波学报, 2019, 38(6): 733-738

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