Study on the enhancement mechanism of terahertz molecular fingerprint sensing

• DOI: 10.1016/j.rinp.2022.105766
• Publication Date: 2022-06-30T02:29:40Z
• Authors: Dan Meng; Jing Liu; Wei Chen; Yu-Yao Cheng; Ke-Wei You; Zhi-Chun Fan; Qiubo Ye; Pao-Hsun Huang; Yu-Shan Chen
• Keywords: Physics; QC1-999; Terahertz; Light-matter interaction; Metasurface; Molecular; 02 engineering and technology; 0210 nano-technology; Fingerprint sensing

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