THz metasensors based on grating-patterned GaN/SrTiO₃ heterostructures for Sudan I trace detection.

IF 3.3 2区物理与天体物理 Q2 OPTICS

Optics express Pub Date : 2025-09-08 DOI:10.1364/OE.566419

Lanju Liang, Jintao Wu, Haiyun Yao, Zongliang Wang, Xin Yan, Zhenhua Li, Ziqun Wang, Chuanxin Huang, Weiyao Xu, Mengna Li, Lu Wang, Zhang Zhang, Zhaoqing Sun, Zhendong Wang

{"title":"THz metasensors based on grating-patterned GaN/SrTiO3 heterostructures for Sudan I trace detection.","authors":"Lanju Liang, Jintao Wu, Haiyun Yao, Zongliang Wang, Xin Yan, Zhenhua Li, Ziqun Wang, Chuanxin Huang, Weiyao Xu, Mengna Li, Lu Wang, Zhang Zhang, Zhaoqing Sun, Zhendong Wang","doi":"10.1364/OE.566419","DOIUrl":null,"url":null,"abstract":"Food safety is crucial, and excessive food additives may cause cancer. In this paper, four novel semiconductor-ultrasurface sensors are proposed to significantly improve the sensitivity and realize the trace detection of Sudan red I. The experimental results show that the GaN-based hypersurface sensor has a low limit of detection (LOD) of 12.5 fg/mL for Sudan I, with a sensitivity far exceeding that of the conventional structure. The grating-patterned gallium nitride enhances the terahertz wave interaction with the analyte through a localized electric field, and its transmission spectrum develops from a single amplitude change to an amplitude-frequency bi-dimensional change, with a maximum frequency shift up to 297.54 GHz. further, the strontium titanate/gallium nitride heterostructure results in a maximum ΔT% = 12.91%. This study realizes the highly sensitive detection of Sudan I and provides a new method for the application of terahertz technology in food safety.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 18","pages":"37856-37867"},"PeriodicalIF":3.3000,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Optics express","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1364/OE.566419","RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"OPTICS","Score":null,"Total":0}

引用次数: 0

Abstract

Food safety is crucial, and excessive food additives may cause cancer. In this paper, four novel semiconductor-ultrasurface sensors are proposed to significantly improve the sensitivity and realize the trace detection of Sudan red I. The experimental results show that the GaN-based hypersurface sensor has a low limit of detection (LOD) of 12.5 fg/mL for Sudan I, with a sensitivity far exceeding that of the conventional structure. The grating-patterned gallium nitride enhances the terahertz wave interaction with the analyte through a localized electric field, and its transmission spectrum develops from a single amplitude change to an amplitude-frequency bi-dimensional change, with a maximum frequency shift up to 297.54 GHz. further, the strontium titanate/gallium nitride heterostructure results in a maximum ΔT% = 12.91%. This study realizes the highly sensitive detection of Sudan I and provides a new method for the application of terahertz technology in food safety.

查看原文本刊更多论文

基于光栅图样GaN/SrTiO3异质结构的太赫兹超传感器用于苏丹I痕量检测。

食品安全至关重要，过量的食品添加剂可能导致癌症。本文提出了四种新型半导体超表面传感器，显著提高了灵敏度，实现了对苏丹红I的痕量检测。实验结果表明，基于gan的超表面传感器对苏丹红I的低检测限（LOD）为12.5 fg/mL，灵敏度远远超过传统结构。光栅化氮化镓通过局域电场增强了太赫兹波与分析物的相互作用，其透射谱由单幅变化发展为幅频双维变化，最大频移可达297.54 GHz。此外，钛酸锶/氮化镓异质结构导致最大ΔT% = 12.91%。本研究实现了苏丹红I的高灵敏度检测，为太赫兹技术在食品安全中的应用提供了一种新的方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Optics express 物理-光学

CiteScore

6.60

自引率

15.80%

发文量

5182

审稿时长

2.1 months

期刊介绍： Optics Express is the all-electronic, open access journal for optics providing rapid publication for peer-reviewed articles that emphasize scientific and technology innovations in all aspects of optics and photonics.