Significant sensing performance of an all-silicon terahertz metasurface chip for Bacillus thuringiensis Cry1Ac protein  

作　　者：Zijian Cui Yue Wang Yongqiang Shi Yongqiang Zhu Dachi Zhang Zhiqi Hong Xuping Feng 

机构地区：[1]Key Laboratory of Ultrafast Photoelectric Technology and Terahertz Science in Shaanxi,Xi’an University of Technology,Xi’an 710048,China [2]Key Laboratory of Engineering Dielectric and Its Application,Ministry of Education,Harbin University of Science and Technology,Harbin 150080,China [3]College of Biosystems Engineering and Food Science,Zhejiang University,Hangzhou 310058,China

出　　处：《Photonics Research》2022年第3期740-746,共7页光子学研究（英文版）

基　　金：Natural Science Foundation of Shaanxi Province(2020JZ-48);Youth Innovation Team of Shaanxi Universities(21JP084);National Natural Science Foundation of China(31801257,61975163);Open Project of Key Laboratory of Engineering Dielectrics and Its Applications,Ministry of Education(KEY1805).

摘　　要：The promising prospect of a terahertz metasurface in sensing and detection applications has attracted increasing attention because of its ability to overcome the classical diffraction limit and the enhancement of field intensity.In this work,a novel scheme based on an all-silicon terahertz plasmon metasurface is proposed and experimentally demonstrated to be a highly sensitive biosensor for the Bacillus thuringiensis Cry1Ac toxin.The regression coefficients between Bacillus thuringiensis protein concentrations and the spectral resonance intensity and frequency were 0.8988 and 0.9238,respectively.The resonance amplitude variation and frequency shift of the metasurface were investigated in terms of both thickness and permittivity change of the analyte,which reflected the protein residue in the actual process.Moreover,the reliability and stability of the metasurface chip were verified by time period,temperature,and humidity control.These results promise the ability of the proposed metasurface chip as a Bacillus thuringiensis protein sensor with high sensitivity and stability.In addition,this novel device strategy provides opportunities for the advancement of terahertz functional applications in the fields of biochemical sensing and detection.

关 键 词：stability process OVERCOME 

分 类 号：TP212.3[自动化与计算机技术—检测技术与自动化装置]