{"title":"IEEE Transactions on Terahertz Science and Technology Publication Information","authors":"","doi":"10.1109/TTHZ.2025.3561554","DOIUrl":"https://doi.org/10.1109/TTHZ.2025.3561554","url":null,"abstract":"","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"15 3","pages":"C3-C3"},"PeriodicalIF":3.9,"publicationDate":"2025-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10982368","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143900569","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.2025.3561552","DOIUrl":"https://doi.org/10.1109/TTHZ.2025.3561552","url":null,"abstract":"","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"15 3","pages":"C2-C2"},"PeriodicalIF":3.9,"publicationDate":"2025-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10982365","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143904631","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}
Wei Fan;Xiaobang Shang;Pekka Kyösti;Steve Hang Wong;Camillo Gentile
{"title":"Guest Editorial: Measurement and Characterization of THz Systems and Their Key Radio Components","authors":"Wei Fan;Xiaobang Shang;Pekka Kyösti;Steve Hang Wong;Camillo Gentile","doi":"10.1109/TTHZ.2025.3556562","DOIUrl":"https://doi.org/10.1109/TTHZ.2025.3556562","url":null,"abstract":"","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"15 3","pages":"305-306"},"PeriodicalIF":3.9,"publicationDate":"2025-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10982362","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143904613","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 Information for Authors","authors":"","doi":"10.1109/TTHZ.2025.3562709","DOIUrl":"https://doi.org/10.1109/TTHZ.2025.3562709","url":null,"abstract":"","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"15 3","pages":"541-542"},"PeriodicalIF":3.9,"publicationDate":"2025-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10982366","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143900538","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.2025.3562713","DOIUrl":"https://doi.org/10.1109/TTHZ.2025.3562713","url":null,"abstract":"","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"15 3","pages":"544-544"},"PeriodicalIF":3.9,"publicationDate":"2025-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10982360","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143900539","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}
Stephen J. C. Yates;Alejandro Pascual Laguna;Willem Jellema;Edgar Castillo-Dominguez;Lorenza Ferrari;Bram Lap;Vignesh Murugesan;Jose R. G. Silva;David Thoen;Ian Veenendaal;Jochem J. A. Baselmans
{"title":"Demonstration of Ultrasensitive KIDs for Future THz Space Borne Polarimeters","authors":"Stephen J. C. Yates;Alejandro Pascual Laguna;Willem Jellema;Edgar Castillo-Dominguez;Lorenza Ferrari;Bram Lap;Vignesh Murugesan;Jose R. G. Silva;David Thoen;Ian Veenendaal;Jochem J. A. Baselmans","doi":"10.1109/TTHZ.2025.3566218","DOIUrl":"https://doi.org/10.1109/TTHZ.2025.3566218","url":null,"abstract":"We present measurements and simulations of the polarization purity of leaky lens-antenna coupled microwave kinetic inductance detectors (KIDs) at 1.5 THz. From polarized phase and amplitude beam pattern measurements we find the integrated cross-polarization ratio to be at –21.5 dB for 1 f#<inline-formula><tex-math>$lambda$</tex-math></inline-formula> spatial sampling. The measurements agree well with the theoretical description which is based on a combination of in-transmission simulation of the antenna feed, and an in-reception analysis of the antenna-KID system. A neutral density filter limited the power per detector to around 500 fW, enabling these measurements to be taken on detectors that in a low background have a measured noise equivalent power of 5–7<inline-formula><tex-math>$times 10^{-20}$</tex-math></inline-formula> W<inline-formula><tex-math>$/sqrt{text{Hz}}$</tex-math></inline-formula>. These combined measurements show that these detectors are excellent candidates for large scale and high-performance imaging polarimetric instruments.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"15 4","pages":"558-565"},"PeriodicalIF":3.9,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144550484","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}
Arnaud Demion;Linus Leo Stöckli;Nicolas Thomas;Silvan Zahno
{"title":"Frequency-Dependent Deconvolution for Enhanced THz-TDS Scans: Accounting for Beam Width Variations in Time Traces","authors":"Arnaud Demion;Linus Leo Stöckli;Nicolas Thomas;Silvan Zahno","doi":"10.1109/TTHZ.2025.3546756","DOIUrl":"https://doi.org/10.1109/TTHZ.2025.3546756","url":null,"abstract":"Terahertz time-domain spectroscopy (THz-TDS) is a powerful tool for nondestructive testing, but the quality of scans is limited by beam spreading effects, which vary with frequency. We propose a deconvolution method that accounts for the changing beam width as a function of frequency. By incorporating frequency-specific Gaussian beam profiles, determined through the knife-edge technique, the proposed method enhances the spatial resolution of THz-TDS scans while keeping the ability to analyze the phase of the signals. Our approach significantly improves contrast and sharpness in both reflectance and transmission modes. This technique offers a more accurate and robust enhancement of THz-TDS imaging.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"15 3","pages":"505-513"},"PeriodicalIF":3.9,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143904641","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}
Yanqing Chen;Feng Huang;Beiyuan Liang;Haobin Su;Xuewei Ju;Xiangfeng Wang
{"title":"A Frequency-Tunable Terahertz Bandpass Filter for Future Communication Systems","authors":"Yanqing Chen;Feng Huang;Beiyuan Liang;Haobin Su;Xuewei Ju;Xiangfeng Wang","doi":"10.1109/TTHZ.2025.3542289","DOIUrl":"https://doi.org/10.1109/TTHZ.2025.3542289","url":null,"abstract":"The importance of the terahertz (THz) region in wireless communication is increasing. THz tunable filters are key components for next-generation communication systems. In this article, we have designed a THz narrowband bandpass filter based on a double-layer frequency selective surface (FSS), which is composed of two X-shaped FSSs cascaded together with different geometric parameters. The center frequency of the double-layer structure is located between the center frequencies of the two single-layer FSSs. Based on the principle of inverse design, we employed intelligent algorithms to automatically optimize the structural parameters of the single-layer FSS. We simulated the transmission spectra of both single-layer and double-layer FSSs using finite-difference time-domain. Subsequently, FSSs were fabricated using femtosecond laser micromachining and characterized using time-domain THz spectroscopy. The experimental results are highly consistent with simulations. The designed double-layer filter exhibits a high Q factor and tunability of the center frequency by changing the spacing between the two FSS layers. Finally, based on an equivalent circuit model, we analyzed the transmission phenomenon of the nonequivalent double-layer FSS structure and attributed it to the resonances of equivalent capacitance and inductance between the FSS layers at different spacings. This approach can be applied to design tunable filters for other frequency bands.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"15 3","pages":"481-486"},"PeriodicalIF":3.9,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143904528","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":"100 Gbit/s and Beyond IEEE 802.15.3d Channelization Compatible THz Communications Enabled by a Broadband MUTC Photodiode","authors":"Ezgi Abacıoğlu;Abdu Subahan Mohammed;Jonas Tebart;Marcel Grzeslo;Tom Neerfeld;José Luis Fernández Estévez;Pascal Szriftgiser;Guillaume Ducournau;Andreas Stöhr","doi":"10.1109/TTHZ.2025.3541824","DOIUrl":"https://doi.org/10.1109/TTHZ.2025.3541824","url":null,"abstract":"We present photonics-driven high data rate IEEE 802.15.3d compliant terahertz (THz) communication links operated at a center frequency of 280 GHz. We analyze wireless data transmission within selected single and dual channels of the IEEE 802.15.3d and assess the outcomes through additional back-to-back (B2B) data transmission measurements and calibrated link budgets of the THz link. The system architecture uses on-wafer probing of a single high-power and highly linear broadband modified unitraveling-carrier photodiode (MUTC-PD). Using the MUTC-PD as THz transmitter, we report 16-QAM 100 Gbit/s 25-cm wireless links for single and dual channel data transmission with significantly low error vector magnitude (EVM) levels, that is, 12.3% and 10.9%, respectively. As for B2B demonstration, we successfully transmit 200 Gbit/s (32-QAM) in a single channel with 7.5% EVM and 160 Gbit/s (16-QAM) in dual channel with 7.8% EVM. We further display the highly linear nature of the MUTC-PD by efficient data transmission with higher modulation formats, which is also supported by the power-saturation characteristics of the PD. To the best of the authors´ knowledge, this is the first study investigating the IEEE 802.15.3d channelization compliancy through system level design and spectral verification while at the same time achieving 100 Gbit/s and beyond data rates with notably low EVM values.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"15 3","pages":"389-399"},"PeriodicalIF":3.9,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10884861","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143904640","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":"Coherent Oscillation in a 2-D Resonant-Tunneling-Diode Terahertz Oscillator Array","authors":"Zhenling Tang;Zilang Zhao;Safumi Suzuki","doi":"10.1109/TTHZ.2025.3541837","DOIUrl":"https://doi.org/10.1109/TTHZ.2025.3541837","url":null,"abstract":"To generate high-power, high-directivity terahertz (THz) radiation, in this article, we propose and fabricate a 2-D resonant-tunneling-diode (RTD) THz oscillator array. The array is formed by vertically intersected twisted slot antennas, where enhanced combined radiation is achieved through the antiphase coupling between adjacent RTDs. Additionally, the electrode shapes are tailored to mitigate the electric field cancelation, further increasing the output power. Experimental results confirm coherent oscillation in the fabricated 2×2 array, with frequencies reaching up to 513 GHz and output power exceeding 0.4 mW at lower frequencies. Simulation results suggest that scaling up the 2-D array maintains the strong coherent coupling, despite a nonuniform amplitude distribution among the RTDs. This amplitude nonuniformity can be effectively addressed by introducing metal–insulator–metal capacitors. Furthermore, simulations also predict improved directivity with increased array scale, resulting in a low-diffusion, quasi-plane wavefront. The proposed structure holds the potential for advancing the broad application prospects of THz waves.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"15 3","pages":"431-439"},"PeriodicalIF":3.9,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143904629","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}