Multi-layer hollow-core PMMA grating tube waveguides for THz sensing applications

被引：4

作者：

Chen, Jian ^{[1
]}

Feng, Jijun ^{[1
]}

Wu, Xinyao ^{[1
]}

Zhao, Yuanming ^{[2
]}

Zhang, Fuling ^{[2
]}

Zhang, Dawei ^{[1
]}

机构：

[1] Univ Shanghai Sci & Technol, Engn Res Ctr Opt Instrument & Syst, Sch Opt Elect & Comp Engn, Shanghai Key Lab Modern Opt Syst,Minist Educ, Shanghai 200093, Peoples R China

[2] 27th Inst China Elect Technol Grp Co, Zhengzhou 450047, Peoples R China

来源：

OPTICS AND LASERS IN ENGINEERING | 2021年 / 142卷

基金：

上海市自然科学基金; 中国国家自然科学基金;

关键词：

Tube waveguide; Chirped grating; Transmission spectra; THz sensing;

D O I：

10.1016/j.optlaseng.2021.106587

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Multi-layer hollow-core PMMA tube waveguides with varying grating structures were theoretically and experimentally investigated for the terahertz (THz) chemical material sensor applications. Compared with single-layer tube, the multi-layer cases can produce a delayed response in the time domain with an improved extinction ratio. A double tube combination consisted of a thick double-groove chirped grating tube and a thin single-groove chirped grating one can realize an improved detection sensitivity. With different extinction ratio of the measured THz spectra, ethanol and vinegar can be distinguished with a sensitivity of about 18 dB/mL. The proposed multi-layer hollow-core grating waveguide can be further applied for the THz gas sensing applications.

引用

页数：7

共 24 条

[1] Terahertz dielectric waveguides [J].