Study on the enhancement mechanism of terahertz molecular fingerprint sensing

Results in Physics

Wei Chen¹  Yu-Yao Cheng²  Ke-Wei You³  Yu-Shan Chen³  Dan Meng³  Jing Liu³  Pao-Hsun Huang³  Zhi-Chun Fan³  Qiubo Ye³ 

[1]Corresponding author.

[2]Institute of Electromagnetics and Acoustics, Xiamen University, Xiamen 361005, China

[3]School of Ocean Information Engineering, Jimei University, Xiamen 361021, China

关键词: Fingerprint sensing;    Terahertz;    Metasurface;    Light-matter interaction;    Molecular;   

DOI  :  

来源: DOAJ

【 摘 要 】

THz-time domain spectroscopy is an effective method of label-free molecular detection, but it is limited by the size of the measured samples. Traditional detection approaches will have to overcome challenges when the analyte are in trace amounts. Here, we propose an enhanced mechanism for terahertz molecular fingerprint sensing, involving an all-dielectric metasurface. Based on incident wave angle scanning under light polarization, the broadband light–matter interaction is effectively enhanced, significantly improving the fingerprint signal of the molecule to be detected. The results demonstrate a new method for trace molecular detection in the terahertz region and large-scale molecular screening.

【 授权许可】

Unknown