IEEE Transactions on Terahertz Science and Technology最新文献

{"title":"Imidacloprid Detection Using Terahertz Metamaterial Based on Electromagnetically Induced Transparency","authors":"Jiaojiao Yu;Gan Liu;Xuan Zhang;Jianyuan Qin","doi":"10.1109/TTHZ.2024.3499740","DOIUrl":"https://doi.org/10.1109/TTHZ.2024.3499740","url":null,"abstract":"Imidacloprid is a common insecticide, which can remain in water, soil, and plant parts with long-term consumption, threaten environment, and human health. Therefore, it is necessary to propose an effective method for imidacloprid detection. Here, a terahertz metamaterial based on electromagnetically induced transparency (EIT) is theoretically and experimentally demonstrated. This metamaterial displays an EIT resonance at 0.89 THz and the physical mechanism of the EIT effect is investigated by analyzing the electric fields and surface current distribution. The EIT resonance can be modulated by changing the geometric structure parameters of the metamaterial. This metamaterial can be used to detect the thickness and the refractive index of the dielectric layer based on the EIT resonance, and can achieve a refractive index sensitivity of 210 GHz/RIU. The detection of imidacloprid shows that the frequency shift and the transmittance change at peak are depend on the change of imidacloprid concentration. The minimum detectable imidacloprid concentration reaches a level of 0.01 ppm in this case. These results theoretically and experimentally prove the feasibility of terahertz metamaterial based on EIT resonance applied in the detection of imidacloprid concentration.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"15 1","pages":"37-44"},"PeriodicalIF":3.9,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142938257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ultrasensitive Terahertz Biodetection Using Metasensors Based on Parity-Time Symmetry","authors":"Heng Liu;Xue Ke;Liran Shen;Yi Zhang;Yuqi Cao;Liangfei Tian;Dibo Hou;Guangxin Zhang","doi":"10.1109/TTHZ.2024.3496560","DOIUrl":"https://doi.org/10.1109/TTHZ.2024.3496560","url":null,"abstract":"Terahertz (THz) spectroscopy has unique sensing capabilities for biological cells due to its high temporal resolution and label-free characteristics. By combining THz technologies with the local enhancement effects of the electric field induced by the metasurface, high sensitivity detection of biological analytes can be achieved. In this article, an ultrasensitive THz metasurface biosensor based on parity-time (PT) symmetry is proposed. Consisting of a cut wire and a pair of split ring resonators, the exceptional point (EP) structure in PT symmetry can realize a balance between the gain and the loss, which leads to a high detection sensitivity. The simulation shows that the proposed biosensor can reach a sensitivity as high as 584 GHz/RIU at the EP with polarization-insensitive stability across a ±35° angle range. Experimentally, the biosensor achieves a sensitivity up to 1030.51 kHz/ (cell/mL\u0000⁻¹\u0000) in detecting different biological cells. Principal component analysis is used to reduce the dimensionality of features composed of frequency shifts and peak amplitudes. A random forest model is then used to classify the processed features and achieves a 98.9% identification accuracy. The proposed biosensor demonstrates capabilities of highly sensitive detection of cancer cells, providing an effective and rapid method for early cancer screening, grading, and staging.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"15 1","pages":"28-36"},"PeriodicalIF":3.9,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142938256","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental Study of Polarization Characteristics of Terahertz Emission","authors":"Takayoshi Yamada;Makito Kobayashi;Yuki Uchiyama;Yutaka Hasegawa;Hiroyuki Maezawa;Hideaki Miyamoto;Yasuko Kasai","doi":"10.1109/TTHZ.2024.3496571","DOIUrl":"https://doi.org/10.1109/TTHZ.2024.3496571","url":null,"abstract":"In this article, we present an experimental study of the polarization characteristics of the emission intensity from the surface of a material using terahertz (THz) passive measurements. We developed an experimental system and method to measure the intensity of a sample at several emission angles with vertical and horizontal polarization relative to the plane of the sample surface within a 5 K error in the brightness temperature. Emissions at 280 and 490 GHz wavebands were measured using subharmonic mixer receivers with Schottky barrier diodes operating at room temperature. We measured the intensity of radiation from a magnetic substance-loading material called MF110, which is used as a calibration hot load of THz radiometers because of its low reflectivity and light weight. Although the experimental conditions limited the range of the emission angle and temperatures of the sample and experimental system, it was confirmed that the polarization characteristics of the emission at each emission angle were in accordance with the Fresnel equations. Because the optical system in the experiment used a polarization rotator and a movable ellipsoidal mirror that enabled the receiver to remain stable, a highly sensitive system to measure sample emission was developed.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"15 1","pages":"1-7"},"PeriodicalIF":3.9,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142938254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental Analysis of the Spectral Reflectivity of Metallic Blazed Diffraction Gratings in the THz Range for Space Instrumentation","authors":"Gonzalo García-Lozano;Guillermo Mercant;Marianela Fernández-Rodríguez;María Carmen Torquemada;Luis M. González;Tomás Belenguer;Alexander Cuadrado;Luis Miguel Sánchez-Brea;Javier Alda;Mahmoud Elshorbagy","doi":"10.1109/TTHZ.2024.3493001","DOIUrl":"https://doi.org/10.1109/TTHZ.2024.3493001","url":null,"abstract":"The core of spectrometers for deep space exploration in the far-infrared spectral range is a diffraction grating optimized for a defined range of wavelengths. This contribution presents an in-depth analysis of the fabrication, morphological characterization, and spectral efficiency verification of this type of gratings operating in the THz range. Two different manufacturing techniques were used: the first one was laser ablation and microstructuring with a five-axis femtosecond laser system, and the second one was a traditional micromachining technique using milling tools. The gratings have a blazed geometry with saw-tooth profiles that enhances the efficiency of the diffracted order of interest, \u0000<inline-formula><tex-math>$m=1$</tex-math></inline-formula>\u0000, at the TM polarization mode, and within a spectral range between 70 and 114 \u0000<inline-formula><tex-math>$mu$</tex-math></inline-formula>\u0000m. The morphological features of the fabricated gratings were measured by confocal microscopy and analyzed using topographic parameters. The measured averaged profiles were used to compute the diffraction efficiency of the fabricated gratings and to compare the actual manufactured profiles against the experimental results. Our measurement setup fixes the wavelength of the illuminating source to six values between 60 and 120 \u0000<inline-formula><tex-math>$mu$</tex-math></inline-formula>\u0000m (2.5 and 4.7 THz). At each of these spectral lines, we have scanned the angle of incidence between 20\u0000<inline-formula><tex-math>$^circ$</tex-math></inline-formula>\u0000 and 75\u0000<inline-formula><tex-math>$^circ$</tex-math></inline-formula>\u0000. This angular range includes the nominal value of the angle of incidence, \u0000<inline-formula><tex-math>$theta _mathrm{inc}=57^circ$</tex-math></inline-formula>\u0000. The experimental values of efficiency can be easily compared with those resulting from computation, where the efficiency is calculated for each one of the available wavelengths as a function of the angle of incidence. This approach has allowed us to validate the design and conclude that gratings fabricated using femtosecond laser ablation perform better than those obtained through micromachining processes. In any case, both manufacturing techniques generate gratings above the validation threshold for diffraction efficiency, \u0000<inline-formula><tex-math>$eta &gt; 0.65$</tex-math></inline-formula>\u0000.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"15 1","pages":"8-16"},"PeriodicalIF":3.9,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10746638","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142938255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"2024 Index IEEE Transactions on Terahertz Science and Technology Vol. 14","authors":"","doi":"10.1109/TTHZ.2024.3492893","DOIUrl":"https://doi.org/10.1109/TTHZ.2024.3492893","url":null,"abstract":"","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"14 6","pages":"893-917"},"PeriodicalIF":3.9,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10746425","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142594939","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"IEEE Women in Engineering","authors":"","doi":"10.1109/TTHZ.2024.3486590","DOIUrl":"https://doi.org/10.1109/TTHZ.2024.3486590","url":null,"abstract":"","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"14 6","pages":"890-890"},"PeriodicalIF":3.9,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10742499","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142579232","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"IEEE Open Access Publishing","authors":"","doi":"10.1109/TTHZ.2024.3486594","DOIUrl":"https://doi.org/10.1109/TTHZ.2024.3486594","url":null,"abstract":"","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"14 6","pages":"891-891"},"PeriodicalIF":3.9,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10742497","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142579145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"TechRxiv: Share Your Preprint Research with the World!","authors":"","doi":"10.1109/TTHZ.2024.3486592","DOIUrl":"https://doi.org/10.1109/TTHZ.2024.3486592","url":null,"abstract":"","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"14 6","pages":"892-892"},"PeriodicalIF":3.9,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10742496","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142579234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"IEEE Transactions on Terahertz Science and Technology Publication Information","authors":"","doi":"10.1109/TTHZ.2024.3482636","DOIUrl":"https://doi.org/10.1109/TTHZ.2024.3482636","url":null,"abstract":"","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"14 6","pages":"C3-C3"},"PeriodicalIF":3.9,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10742495","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142579233","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"IEEE Microwave Theory and Techniques Society Information","authors":"","doi":"10.1109/TTHZ.2024.3482632","DOIUrl":"https://doi.org/10.1109/TTHZ.2024.3482632","url":null,"abstract":"","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"14 6","pages":"C2-C2"},"PeriodicalIF":3.9,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10742500","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142579147","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}