Article
Chemistry, Analytical
Xinxin Deng, Yanchun Shen, Bingwei Liu, Ziyu Song, Xiaoyong He, Qinnan Zhang, Dongxiong Ling, Dongfeng Liu, Dongshan Wei
Summary: In this study, a metamaterial sensor was designed and used to detect citrate salts. Factors affecting the sensor's sensitivity were analyzed and discussed, and it was found that THz spectroscopy combined with the metamaterial sensor could provide a rapid and accurate detection of citrate salts.
Article
Optics
Zhaoxin Geng, Zhaoyang Wang, Chang Liu
Summary: In this study, a flexible terahertz metamaterial biosensor was designed, fabricated, and characterized. The metamaterial exhibited multi-resonance dips in a specific frequency range and had the capability to self-correct sensing errors. The sensitivity and performance of the metamaterial could be tuned by adjusting its geometric parameters.
Article
Engineering, Electrical & Electronic
Yuwei Liu, Daoye Zheng, Qiuxiao Feng, Yu-Sheng Lin
Summary: This article presents a design of an electrothermally controllable terahertz metamaterial composed of split-ring resonators on a silicon substrate. By applying a direct current bias voltage, the surrounding refraction index changes, resulting in resonant frequency shift. The proposed design achieves a tunable triple-resonance in transverse electric mode, with tuning ranges of 24 GHz, 40 GHz, and 32 GHz, respectively. The maximum sensitivity is 42 GHz/volt and the maximum Q-factor is 24.5. This research provides potential applications of the electrothermally controllable terahertz metamaterial in polarization-dependent filters and sensors.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Review
Materials Science, Multidisciplinary
Chuanxin Chen, Minqi Chai, Meihua Jin, Tao He
Summary: Terahertz metamaterial absorbers (TMAs) efficiently absorb electromagnetic waves in the range of 0.1-10 THz, achieving perfect absorption and broad band absorption. Their ultra-thin design and tunable electromagnetic properties make them highly valuable in communication, imaging, detection, and security inspection applications.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Materials Science, Multidisciplinary
Jun Yang, Limei Qi, Bin Li, Liqin Wu, Dan Shi, Junaid Ahmed Uqaili, Xiang Tao
Summary: A real-time and label-free terahertz metamaterial sensor is proposed to distinguish normal and abnormal concentrations of glucose, showing high sensitivity and a measurement upper limit.
RESULTS IN PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Jitong Zhong, Xiaocan Xu, Yu-Sheng Lin
Summary: The MEMS-based tunable terahertz metamaterial (TTM) exhibits tunable characteristics in resonance, polarization-dependent, and electromagnetically induced transparency (EIT) due to the configuration of eSRR. It shows potential application in refraction index sensors with good sensing performances.
Article
Chemistry, Analytical
Ja-Yu Lu, Po-Lun Chen, Borwen You
Summary: In this study, a 3D plasmonic structure based on a metal-coated woven-wire mesh (MCWM) was used for trace amount analyte sensing combined with THz spectroscopy. By experiment and numerical simulation, dual spectral features were observed in the transmission spectrum, and different types and quantities of analytes were successfully identified.
Article
Optics
Pei-Jung Wu, Jing-Ting Hung, Cho-Fan Hsieh, Chii-Rong Yang, Chan-Shan Yang
Summary: Human exhaled gases contain volatile organic compounds that can be used to detect diseases. Current electronic sensors for nitric oxide detection have limitations, and optical detection methods in the ultraviolet to visible light range are underexplored. This study presents a designed metamaterial for terahertz frequency range operation, which enhances gas absorption. The proposed metamaterial holds promise for physical monitoring applications and the development of wearable electronic devices.
Article
Chemistry, Analytical
Wei-Hsi Lai, Binghui Li, Shih-Huai Fu, Yu-Sheng Lin
Summary: This study proposes a tunable terahertz (THz) metamaterial using the micro-electro-mechanical system (MEMS) technique for pressure sensing application. The structure of this MEMS-based tunable metamaterial (MTM) consists of gold split-ring resonators (SRRs) on a patterned silicon substrate with through Si via (TSV). By changing the angle of the SRR cantilever, the resonances in transverse magnetic (TM) mode and transverse electric (TE) mode can be tuned. These results demonstrate the potential applications of MTM design in pressure and flow rate sensors.
Article
Engineering, Electrical & Electronic
Xiaoxue Du, Hanping Mao, Yuting Yan, Xiaodong Zhang, Yafei Wang, Yong Liu, Bin Wang, Xiaoyue Yang, Qiang Shi
Summary: In this study, a method using terahertz combined with metamaterial sensors was proposed to detect plant growth regulators, aiming to solve the problems of low sensitivity and complex sample pretreatment in traditional detection. Two different structured metamaterial sensors were designed and analyzed for their differences in frequency domain, time domain, and absorption characteristics in detecting plant growth regulators. The results showed that both metamaterial sensors effectively detected the four plant growth regulator solutions with concentrations as low as 0.05 mg/L. In terms of detection and sensing, metamaterial sensor 2 outperformed metamaterial sensor 1 in terms of frequency shift, sensitivity, figure of merit value, vibration amplitude, and change rate of absorption intensity, demonstrating better detection performance. However, in terms of sample identification, metamaterial sensor 1 was more suitable for identifying daminozide and naphthaleneacetic acid solutions, while metamaterial sensor 2 was more suitable for detecting glyphosine and gibberellic acid solutions. This study provides a new method for multi-target fusion to detect plant growth regulators with high sensitivity and accuracy.
IEEE SENSORS JOURNAL
(2022)
Article
Spectroscopy
Bin Li, Junpeng Bai, Shujuan Zhang
Summary: A new metamaterial method based on terahertz spectroscopy was developed in this study to detect low concentrations of the quinolone antibacterial drug noroxin, providing a theoretical and experimental basis for the rapid detection of antibiotic residues in food matrices. The method presented a noroxin detection limit of 0.01 µg/mL, demonstrating its effectiveness in detecting low concentrations of the antibiotic.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Chemistry, Multidisciplinary
Jiahao Yang, Yu-Sheng Lin
Summary: Two types of refractive index sensors based on tunable terahertz metamaterials utilizing different geometric positions for resonance tuning were proposed, demonstrating flexibility in real applications and enhanced sensitivity in varying refractive index environments.
Article
Materials Science, Multidisciplinary
Yao Wen, Tao Xu, Yu-Sheng Lin
Summary: This design presents a MEMS-based tunable terahertz metamaterial device with polarization-dependent sensing characteristics. The device can achieve tunable dual-band resonances in TE and TM modes by changing the gap between resonators, and it exhibits sensitivity to changes in environmental refractive index. The results indicate high linear sensitivity and excellent performance for gas and environmental applications.
RESULTS IN PHYSICS
(2021)
Article
Chemistry, Analytical
Chao Tang, Jing Yang, Yadi Wang, Jie Cheng, Xueling Li, Chao Chang, Jun Hu, Junhong Lu
Summary: This study introduces a label-free method for probing the hydration dynamics of collective A beta aggregates in liquids using terahertz spectroscopy, by utilizing A beta aggregates-containing water nanodroplets to improve signal-to-noise ratio. The integration of a metamaterial sensor and nanoconfined droplets enhances sensitivity, allowing for the detection of low concentrations of A beta aggregates in buffer solutions. This novel approach provides a valuable toolkit for bioanalytical applications in neurobiology and enables tracing ultrafast dynamic biological processes in fundamental science.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Review
Nanoscience & Nanotechnology
Riccardo Degl'Innocenti, Hungyen Lin, Miguel Navarro-Cia
Summary: The terahertz range is a fast-evolving field with unique applications in spectroscopy, quantum electronics, sensing, and wireless communications beyond 5G. Among various approaches, metamaterial-based terahertz modulators have shown great success due to their ease of realization, high efficiency, and spectral versatility. This review presents the latest developments in this field, with a focus on key applications in sensing, wireless communications, and quantum electronics that have benefited from these advancements.
Article
Engineering, Electrical & Electronic
Binyi Qin, Zhi Li, Fangrong Hu, Cong Hu, Tao Chen, Huo Zhang, Yonghong Zhao
IEEE TRANSACTIONS ON TERAHERTZ SCIENCE AND TECHNOLOGY
(2018)
Article
Physics, Condensed Matter
Yu Chen, Zhihao Chen, Binyi Qin, Xiaoyu Dai
ADVANCES IN CONDENSED MATTER PHYSICS
(2018)
Article
Physics, Condensed Matter
Xianhua Yin, Wei Mo, Qiang Wang, Binyi Qin
ADVANCES IN CONDENSED MATTER PHYSICS
(2018)
Article
Mathematical & Computational Biology
Di Zhao, Yanhu Huang, Feng Zhao, Binyi Qin, Jincun Zheng
Summary: A novel deep learning-based method for MR image reconstruction, known as the RWS-DIP method, is proposed in this paper, which does not require pre-training procedure and pre-training datasets. This method incorporates a reference image and utilizes wavelet sparsity to improve network efficiency.
COMPUTATIONAL AND MATHEMATICAL METHODS IN MEDICINE
(2021)
Article
Computer Science, Information Systems
Shubao Pan, Binyi Qin, Lvqing Bi, Jincun Zheng, Ruizhao Yang, Xiaofeng Yang, Yun Li, Zhi Li
Summary: Genetically modified crops have been controversial regarding food safety. By utilizing unsupervised learning method PCA-mean shift combined with terahertz time-domain spectroscopy, a potential identification tool with high accuracy for genetically modified crops can be achieved.
SECURITY AND COMMUNICATION NETWORKS
(2021)
Article
Chemistry, Multidisciplinary
Ruizhao Yang, Yun Li, Binyi Qin, Di Zhao, Yongjin Gan, Jincun Zheng
Summary: This study proposed a method combining WGAN and ResNet for detecting carbendazim using terahertz spectroscopy. The results showed that this method achieved an accuracy rate of 91.4%, outperforming other methods.