{"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}
{"title":"IEEE Transactions on Terahertz Science and Technology Information for Authors","authors":"","doi":"10.1109/TTHZ.2024.3482634","DOIUrl":"https://doi.org/10.1109/TTHZ.2024.3482634","url":null,"abstract":"","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"14 6","pages":"888-889"},"PeriodicalIF":3.9,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10742498","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142579142","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}
Teppei Yonetsu;Hiroyuki Maezawa;Yudai Matsumoto;Takuto Oda
{"title":"Application of Millimeter-Wave Heterodyne Spectroscopy With a Superconducting Receiver for Dusty Plasma Diagnostics","authors":"Teppei Yonetsu;Hiroyuki Maezawa;Yudai Matsumoto;Takuto Oda","doi":"10.1109/TTHZ.2024.3488353","DOIUrl":"https://doi.org/10.1109/TTHZ.2024.3488353","url":null,"abstract":"Diagnosing the physical and chemical states of minor constituents in dusty plasma, including their temperature and abundance, is challenging. In this research, the spectral lines of HCN formed in capacitively coupled plasma (CCP) were measured by 0.17–0.19-THz band heterodyne spectroscopy using a superconductor/insulator/superconductor receiver and a new modified chopper-wheel calibration technique. The rotational temperature of N\u0000<inline-formula><tex-math>$_{2}$</tex-math></inline-formula>\u0000 determined by optical emission spectroscopy is approximately 310–380 K, which is similar to the kinetic temperature of the plasma gas, while the rotational temperature of HCN is estimated to be approximately 400–570 K. This suggests that the HCN in the observation field of view contains components affected by high-energy physical processes such as sputtering and photochemistry during the formation process. This passive heterodyne spectroscopic technique in the millimeter to THz frequency band will provide a useful tool for diagnosing the physical and chemical conditions of dusty plasma.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"15 1","pages":"17-27"},"PeriodicalIF":3.9,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10738471","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142938253","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}
Vasily V. Gerasimov;Ildus Sh. Khasanov;Valeria D. Kukotenko;Alexey G. Lemzyakov;Artem I. Ivanov;Irina V. Antonova;Aleksandr G. Cherevko
{"title":"Terahertz Surface Plasmon Refractometry of Composite Graphene Nanoparticle Films","authors":"Vasily V. Gerasimov;Ildus Sh. Khasanov;Valeria D. Kukotenko;Alexey G. Lemzyakov;Artem I. Ivanov;Irina V. Antonova;Aleksandr G. Cherevko","doi":"10.1109/TTHZ.2024.3485870","DOIUrl":"https://doi.org/10.1109/TTHZ.2024.3485870","url":null,"abstract":"Graphene is one of the most promising materials for terahertz (THz) plasmonics. Composite layers composed of graphene nanoparticles are easier to fabricate, and their composition variability allows for the customization of desired optical surface characteristics. This study is the first to apply THz surface plasmon refractometry methods to investigate composite films of graphene nanoparticles (with poly-34-ethylenedioxythiophene/ polystyrene sulfonate additive) with thicknesses of 35 and 400 nm. The Novosibirsk free-electron laser, generating monochromatic wavelength-tunable coherent radiation, was used as a THz radiation source. The measurement of the effective dielectric permittivity of the layers at wavelengths of 141 and 197 μm indicated their good conductive properties. Results of the comparison of permittivity for different thicknesses of graphene layers have revealed a complex mechanism of conductivity of the composite material, which differs significantly from the Drude model estimations. So, further thorough experimental research of this material is required. The main results suggest the potential application of composite graphene films hundreds of nanometers thick in plasmonic integrated circuits and THz frequency range communication lines.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"15 1","pages":"61-68"},"PeriodicalIF":3.9,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142938260","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}
Guoxiang Shu;Huaxing Pan;Xinlun Xie;Shaocheng Ma;Jiawei Tang;Siyuan Liu;Mingze Li;Cunjun Ruan;Wenlong He
{"title":"Study of Magnetic Focusing Structures for 220 GHz Sheet Beam Traveling Wave Tubes","authors":"Guoxiang Shu;Huaxing Pan;Xinlun Xie;Shaocheng Ma;Jiawei Tang;Siyuan Liu;Mingze Li;Cunjun Ruan;Wenlong He","doi":"10.1109/TTHZ.2024.3484953","DOIUrl":"https://doi.org/10.1109/TTHZ.2024.3484953","url":null,"abstract":"The study of three types of magnetic focusing structures for terahertz band sheet beam traveling wave tubes is presented in this article. Although there are a lot of reported literatures regarding the study of magnetic focusing structures, most of them just focused on a single type of focusing structure and lack of systematic research (for example, only simulation study), with a limited discourse on the comparative performance across different types of focusing structures. In addition, many reported simulations regarding the focusing structures are normally based on the ideal electron beam, resulting in reduced simulation accuracy to some extent. In this article, three types of focusing structures (uniform magnetic (UM) / pole offset periodic cusped magnetic (PO-PCM)/PCM-tunable quadrupolar magnet focusing structures) are studied in detail by theoretical analysis and simulation design. The PO-PCM focusing structure is experimentally studied as a representative. Simulation results based on the electron beam emitted from the designed sheet beam electron gun show that a stable long-distance transmission over 112 mm and 85 mm can be achieved with the UM focusing structure and the PCM focusing structures, respectively. To verify the design, the microfabrication and test of the PO-PCM focusing structure is carried out as a representative. The measured magnetic field matches well with its simulated and theoretically calculated counterparts. The beam-wave interaction cosimulation results based on different focusing structures have a discrepancy among them.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"15 1","pages":"120-127"},"PeriodicalIF":3.9,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142938235","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":"GaAs PIN Diode Based 220 GHz Switch Design Using Flip Chip Technique","authors":"Xiaolin Hao;Ao Zhang;Guodong Gu;Shixiong Liang;Xubo Song;Lisen Zhang;Peng Xu;Jianjun Gao;Zhihong Feng","doi":"10.1109/TTHZ.2024.3481959","DOIUrl":"https://doi.org/10.1109/TTHZ.2024.3481959","url":null,"abstract":"GaAs PIN diode based single-pole single-throw (SPST) and single-pole double-throw (SPDT) switches with low insertion loss have been designed and fabricated up to 220 GHz. The \u0000<sc>on</small>\u0000-state and \u0000<sc>off</small>\u0000-state small-signal models of GaAs PIN diodes have been developed, and the parameter extraction procedure is explained in more detail. GaAs PIN diodes have been mounted on the quartz substrate using the flip chip technique to achieve integrated subterahertz switches. The developed SPST switch has 3.2 dB insertion loss and 29 dB isolation in the frequency range of 220 to 230 GHz. The measurement of the SPDT switch reveals an isolation of >20 dB and an insertion loss of <3.3 dB in the frequency range of 213 to 225 GHz. This switch boasts the highest operating frequency reported based on GaAs PIN diodes.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"15 1","pages":"100-106"},"PeriodicalIF":3.9,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142938198","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}