Pub Date : 2025-09-05DOI: 10.1109/TTHZ.2025.3605512
{"title":"IEEE Transactions on Terahertz Science and Technology Publication Information","authors":"","doi":"10.1109/TTHZ.2025.3605512","DOIUrl":"https://doi.org/10.1109/TTHZ.2025.3605512","url":null,"abstract":"","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"15 5","pages":"C3-C3"},"PeriodicalIF":3.9,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11152630","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144998240","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}
Pub Date : 2025-09-05DOI: 10.1109/TTHZ.2025.3602918
{"title":"IEEE Transactions on Terahertz Science and Technology Information for Authors","authors":"","doi":"10.1109/TTHZ.2025.3602918","DOIUrl":"https://doi.org/10.1109/TTHZ.2025.3602918","url":null,"abstract":"","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"15 5","pages":"800-801"},"PeriodicalIF":3.9,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11152657","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144998305","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}
Pub Date : 2025-09-05DOI: 10.1109/TTHZ.2025.3597725
Jiayu Guo;Zachary Taylor;Frank Hegmann
{"title":"Editorial: Second Special Issue on Selected Emerging Trends in Terahertz Science and Technology","authors":"Jiayu Guo;Zachary Taylor;Frank Hegmann","doi":"10.1109/TTHZ.2025.3597725","DOIUrl":"https://doi.org/10.1109/TTHZ.2025.3597725","url":null,"abstract":"","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"15 5","pages":"741-742"},"PeriodicalIF":3.9,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11152661","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144998213","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}
Pub Date : 2025-09-05DOI: 10.1109/TTHZ.2025.3602892
{"title":"IEEE Transactions on Terahertz Science and Technology Information for Authors","authors":"","doi":"10.1109/TTHZ.2025.3602892","DOIUrl":"https://doi.org/10.1109/TTHZ.2025.3602892","url":null,"abstract":"","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"15 5","pages":"944-945"},"PeriodicalIF":3.9,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11152649","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144998238","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}
Pub Date : 2025-09-05DOI: 10.1109/TTHZ.2025.3605505
{"title":"IEEE Women in Engineering","authors":"","doi":"10.1109/TTHZ.2025.3605505","DOIUrl":"https://doi.org/10.1109/TTHZ.2025.3605505","url":null,"abstract":"","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"15 5","pages":"946-946"},"PeriodicalIF":3.9,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11152653","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144998185","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}
Pub Date : 2025-09-05DOI: 10.1109/TTHZ.2025.3605501
{"title":"TechRxiv: Share Your Preprint Research with the World!","authors":"","doi":"10.1109/TTHZ.2025.3605501","DOIUrl":"https://doi.org/10.1109/TTHZ.2025.3605501","url":null,"abstract":"","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"15 5","pages":"947-947"},"PeriodicalIF":3.9,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11152648","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144998303","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}
A staggered double-vane traveling-wave tube has garnered significant attention due to its advantages of high power, wide bandwidth in high frequency, long service life, planar structure, suitability for a high-current sheet electron beam, and so on. In this article, a G-band staggered double-vane traveling-wave tube has been designed and verified. During the design process, double-mode working operation has been adopted to further improve the working bandwidth. Simulation results indicate that the under the sheet-beam excitation, the proposed design scheme can achieve a peak output power of 220 W at 215 GHz, accompanied by a 3-dB bandwidth exceeding 60 GHz, which fully verifies the effectiveness of the double-mode operation on realizing the ultrawideband power output. Meanwhile, in order to further enhance the practical feasibility of the designed scheme, a planar distributed three-layer structure has been designed in detail, followed by fabrication and cold test to verify the structural correctness. Test results show that the bandwidth and the transmission properties are in good agreement with simulation results, fully verifying the feasibility of the designed planar three-layer structure in fabricating implementation and further validating the correctness of the double-mode working operation. This proposed scheme holds promise for the development of high-power ultrawideband terahertz radiation sources, further demonstrating application potential in relevant fields.
{"title":"Simulation and Cold Test of the G-Band Ultrawideband Double-Mode Staggered Double-Vane Traveling-Wave Tube","authors":"Wenbo Wang;Cunjun Ruan;Pengpeng Wang;Yaqi Zhao;Tianyi Xu;Yitao Hou","doi":"10.1109/TTHZ.2025.3605986","DOIUrl":"https://doi.org/10.1109/TTHZ.2025.3605986","url":null,"abstract":"A staggered double-vane traveling-wave tube has garnered significant attention due to its advantages of high power, wide bandwidth in high frequency, long service life, planar structure, suitability for a high-current sheet electron beam, and so on. In this article, a <italic>G</i>-band staggered double-vane traveling-wave tube has been designed and verified. During the design process, double-mode working operation has been adopted to further improve the working bandwidth. Simulation results indicate that the under the sheet-beam excitation, the proposed design scheme can achieve a peak output power of 220 W at 215 GHz, accompanied by a 3-dB bandwidth exceeding 60 GHz, which fully verifies the effectiveness of the double-mode operation on realizing the ultrawideband power output. Meanwhile, in order to further enhance the practical feasibility of the designed scheme, a planar distributed three-layer structure has been designed in detail, followed by fabrication and cold test to verify the structural correctness. Test results show that the bandwidth and the transmission properties are in good agreement with simulation results, fully verifying the feasibility of the designed planar three-layer structure in fabricating implementation and further validating the correctness of the double-mode working operation. This proposed scheme holds promise for the development of high-power ultrawideband terahertz radiation sources, further demonstrating application potential in relevant fields.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"16 2","pages":"203-209"},"PeriodicalIF":3.9,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146102963","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}
Pub Date : 2025-08-29DOI: 10.1109/TTHZ.2025.3603872
Berhanu T. Bulcha;Timothy A. Livengood;Paul E. Racette;Mohamed Mounir Abdin;Negar Ehsan;Kevin A. Horgan;Tilak Hewagama;Gordon Chin;Thomas Essinger-Hileman;Manuel Quijada;Carrie Anderson;Theodore Reck;Jeffrey Hasler;Richard J. Wylde
Water is fundamental to life on Earth and is a key molecular marker for a habitable environment. Yet, after decades of solar system exploration, the origins, abundance, and distribution of water in planetary bodies are still debated. The Moon system is close to us, and water on the Moon is of great interest to the exploration community as a resource to support future robotic missions and astronauts on long-term missions. For these reasons, developing advanced sensors to measure the distribution of water is of interest, with deployability facilitated by high sensitive, compactness, and low power requirements. This article presents advancements in submillimeter and terahertz receivers to support the submillimeter solar observation of lunar volatiles experiment (SSOLVE). SSOLVE is under development as a candidate for NASA's exploration of the Moon in forthcoming lunar lander missions, to measure water vapor above the lunar surface. SSOLVE measures the column abundance of water vapor (H2O) at 556.93 GHz and its primary photolysis product, Hydroxyl (OH) at 2.509 THz in absorption against thermal emission by the Sun to quantify abundance in the lunar exosphere. This article primarily focuses on the SSOLVE's front-end optics and receivers while introducing other parts of the instrument.
{"title":"Submillimeter-Wave and Terahertz Receivers for Lunar Volatiles Experiment","authors":"Berhanu T. Bulcha;Timothy A. Livengood;Paul E. Racette;Mohamed Mounir Abdin;Negar Ehsan;Kevin A. Horgan;Tilak Hewagama;Gordon Chin;Thomas Essinger-Hileman;Manuel Quijada;Carrie Anderson;Theodore Reck;Jeffrey Hasler;Richard J. Wylde","doi":"10.1109/TTHZ.2025.3603872","DOIUrl":"https://doi.org/10.1109/TTHZ.2025.3603872","url":null,"abstract":"Water is fundamental to life on Earth and is a key molecular marker for a habitable environment. Yet, after decades of solar system exploration, the origins, abundance, and distribution of water in planetary bodies are still debated. The Moon system is close to us, and water on the Moon is of great interest to the exploration community as a resource to support future robotic missions and astronauts on long-term missions. For these reasons, developing advanced sensors to measure the distribution of water is of interest, with deployability facilitated by high sensitive, compactness, and low power requirements. This article presents advancements in submillimeter and terahertz receivers to support the submillimeter solar observation of lunar volatiles experiment (SSOLVE). SSOLVE is under development as a candidate for NASA's exploration of the Moon in forthcoming lunar lander missions, to measure water vapor above the lunar surface. SSOLVE measures the column abundance of water vapor (H<sub>2</sub>O) at 556.93 GHz and its primary photolysis product, Hydroxyl (OH) at 2.509 THz in absorption against thermal emission by the Sun to quantify abundance in the lunar exosphere. This article primarily focuses on the SSOLVE's front-end optics and receivers while introducing other parts of the instrument.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"16 1","pages":"1-9"},"PeriodicalIF":3.9,"publicationDate":"2025-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11143819","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145778385","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}
Combining artificial intelligence (AI) with state-of-the-art spectroscopy has revolutionized data processing, significantly improving speed, and accuracy. However, in the terahertz (THz) frequency range, AI-assisted techniques remain largely confined to research laboratories due to the complexity and cost of existing systems. Here, we introduce a compact and simplified multispectral THz spectrometer with a novel architecture, achieving performance comparable to conventional time-domain THz spectroscopy by leveraging AI for efficient data interpretation. Our compact system integrates a broadband fiber-coupled THz emitter and a custom-built rotating frequency-selective surface chopper. Using synchronous detection by a fast intensity sensor, we capture multispectral data in a single rotation of the chopper wheel and analyze it with a deep neural network model for rapid and reliable sample identification. We demonstrated real-time classification with over 98% accuracy within just 10 ms of acquisition, even for materials lacking distinct THz fingerprints. This compact and cost-effective approach enables highly efficient THz spectroscopy outside laboratory settings, offering a scalable solution for industrial, biomedical, and security applications.
{"title":"Real-Time Material Identification Using a Fast and Simplified AI-Assisted Terahertz Spectrometer","authors":"Rejeena Radhika Sebastian;Redwan Ahmad;Jonathan Lafrenière-Greig;Xavier Ropagnol;François Blanchard","doi":"10.1109/TTHZ.2025.3603959","DOIUrl":"https://doi.org/10.1109/TTHZ.2025.3603959","url":null,"abstract":"Combining artificial intelligence (AI) with state-of-the-art spectroscopy has revolutionized data processing, significantly improving speed, and accuracy. However, in the terahertz (THz) frequency range, AI-assisted techniques remain largely confined to research laboratories due to the complexity and cost of existing systems. Here, we introduce a compact and simplified multispectral THz spectrometer with a novel architecture, achieving performance comparable to conventional time-domain THz spectroscopy by leveraging AI for efficient data interpretation. Our compact system integrates a broadband fiber-coupled THz emitter and a custom-built rotating frequency-selective surface chopper. Using synchronous detection by a fast intensity sensor, we capture multispectral data in a single rotation of the chopper wheel and analyze it with a deep neural network model for rapid and reliable sample identification. We demonstrated real-time classification with over 98% accuracy within just 10 ms of acquisition, even for materials lacking distinct THz fingerprints. This compact and cost-effective approach enables highly efficient THz spectroscopy outside laboratory settings, offering a scalable solution for industrial, biomedical, and security applications.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"16 2","pages":"131-140"},"PeriodicalIF":3.9,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146102994","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}
Pub Date : 2025-08-28DOI: 10.1109/TTHZ.2025.3603977
Haoxiang Li;Da Mu;Jiaojiao Ren;Fang Liu;Yu Zhou
Transmission-phase metasurfaces are typically limited to the modulation of a single frequency, which restricts their application across broadband spectra. To enhance the depth of field in terahertz (THz) imaging systems and expand the use of metasurfaces in THz time-domain spectroscopy (THz-TDS) systems, a phase gradient was designed and a metasurface capable of generating Bessel beams was fabricated using a ceramic slurry. The results demonstrate that the metasurface can produce THz Bessel beams with a nondiffracting length of 160 mm approximately in the 0.4–0.6 THz frequency range while maintaining consistent nondiffracting regions across different frequencies. The imaging system exhibited stable lateral resolution and strong anti-interference capability, which effectively improved the depth of field in THz imaging. This study provides a novel method for generating broadband THz Bessel beams, extends the application of transmission-phase metasurfaces in THz-TDS systems, and has practical value for THz imaging and nondestructive testing.
{"title":"Applications of Broadband THz Bessel Beams Imaging Based on Transmission-Phase Metasurfaces","authors":"Haoxiang Li;Da Mu;Jiaojiao Ren;Fang Liu;Yu Zhou","doi":"10.1109/TTHZ.2025.3603977","DOIUrl":"https://doi.org/10.1109/TTHZ.2025.3603977","url":null,"abstract":"Transmission-phase metasurfaces are typically limited to the modulation of a single frequency, which restricts their application across broadband spectra. To enhance the depth of field in terahertz (THz) imaging systems and expand the use of metasurfaces in THz time-domain spectroscopy (THz-TDS) systems, a phase gradient was designed and a metasurface capable of generating Bessel beams was fabricated using a ceramic slurry. The results demonstrate that the metasurface can produce THz Bessel beams with a nondiffracting length of 160 mm approximately in the 0.4–0.6 THz frequency range while maintaining consistent nondiffracting regions across different frequencies. The imaging system exhibited stable lateral resolution and strong anti-interference capability, which effectively improved the depth of field in THz imaging. This study provides a novel method for generating broadband THz Bessel beams, extends the application of transmission-phase metasurfaces in THz-TDS systems, and has practical value for THz imaging and nondestructive testing.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"16 2","pages":"141-150"},"PeriodicalIF":3.9,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146102960","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}
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