Pub Date : 2020-11-08DOI: 10.1109/IRMMW-THz46771.2020.9370686
R. Giusto, F. Centurelli, F. Palma
We present the study of a new structure for integrated rectifier, realized with standard CMOS technology, suitable to detect the terahertz radiation, at room temperature. The structure consists of a capacitive rectenna, designed as a patch antenna realized with the last metal layer of the CMOS process. A whisker reaches the gate of a MOS-FET transistor from the antenna, obtained with a standard via. Rectification can be obtained by the self-mixing effect occurring into the plasma waves generate in the substrate, underneath the gate. The proposed solution can be integrated with existing imaging systems, since it does not requires scaling toward very narrow and costly technological node.
{"title":"CMOS integrated system for Terahertz Detection","authors":"R. Giusto, F. Centurelli, F. Palma","doi":"10.1109/IRMMW-THz46771.2020.9370686","DOIUrl":"https://doi.org/10.1109/IRMMW-THz46771.2020.9370686","url":null,"abstract":"We present the study of a new structure for integrated rectifier, realized with standard CMOS technology, suitable to detect the terahertz radiation, at room temperature. The structure consists of a capacitive rectenna, designed as a patch antenna realized with the last metal layer of the CMOS process. A whisker reaches the gate of a MOS-FET transistor from the antenna, obtained with a standard via. Rectification can be obtained by the self-mixing effect occurring into the plasma waves generate in the substrate, underneath the gate. The proposed solution can be integrated with existing imaging systems, since it does not requires scaling toward very narrow and costly technological node.","PeriodicalId":6746,"journal":{"name":"2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"1 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2020-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85461392","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-11-08DOI: 10.1109/IRMMW-THz46771.2020.9370669
Xinhou Chen, Hangtian Wang, Gaoshuai Wei, Chun Wang, Haihui Zhao, Fengwei Guo, T. Nie, J. Miao, Li Wang, Weisheng Zhao, Xiaojun Wu
We successfully realized ultrafast, broadband and efficient generation of chiral terahertz waves in iron-topological insulator heterostructures excited by femtosecond laser pulses, and the chirality can be regulated by polarization states of optical pumping laser pulses.
{"title":"Generation and Manipulation of Chiral Terahertz Waves in Iron-Topological Insulator Heterostructures","authors":"Xinhou Chen, Hangtian Wang, Gaoshuai Wei, Chun Wang, Haihui Zhao, Fengwei Guo, T. Nie, J. Miao, Li Wang, Weisheng Zhao, Xiaojun Wu","doi":"10.1109/IRMMW-THz46771.2020.9370669","DOIUrl":"https://doi.org/10.1109/IRMMW-THz46771.2020.9370669","url":null,"abstract":"We successfully realized ultrafast, broadband and efficient generation of chiral terahertz waves in iron-topological insulator heterostructures excited by femtosecond laser pulses, and the chirality can be regulated by polarization states of optical pumping laser pulses.","PeriodicalId":6746,"journal":{"name":"2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"16 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2020-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81870643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-11-08DOI: 10.1109/IRMMW-THz46771.2020.9370482
Fengwei Guo, Chun Wang, Xinhou Chen, C. Pandey, T. Nie, J. Miao, Weisheng Zhao, Li Wang, Xiaojun Wu
Spintronic terahertz emission microscopy has been employed to investigate the influence of gold nanoparticle modulated terahertz emission from W/CoFeB/Pt heterostructures, and obvious modification phenomenon was observed.
{"title":"Spintronic Terahertz Emission Regulated by Au Nanoparticles","authors":"Fengwei Guo, Chun Wang, Xinhou Chen, C. Pandey, T. Nie, J. Miao, Weisheng Zhao, Li Wang, Xiaojun Wu","doi":"10.1109/IRMMW-THz46771.2020.9370482","DOIUrl":"https://doi.org/10.1109/IRMMW-THz46771.2020.9370482","url":null,"abstract":"Spintronic terahertz emission microscopy has been employed to investigate the influence of gold nanoparticle modulated terahertz emission from W/CoFeB/Pt heterostructures, and obvious modification phenomenon was observed.","PeriodicalId":6746,"journal":{"name":"2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"88 1","pages":"01-02"},"PeriodicalIF":0.0,"publicationDate":"2020-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82124131","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-11-08DOI: 10.1109/IRMMW-THz46771.2020.9370698
Z. Ioannidis, T. Rzesnicki, K. Avramidis, G. Gantenbein, S. Illy, J. Jin, L. Krier, I. Pagonakis, S. Ruess, M. Schmid, M. Thumm, J. Jelonnek
The KIT 170 GHz – 2 MW longer-pulse coaxial-cavity gyrotron is continuously upgraded with the goal to reach 1 s pulses with a modular construction. In this work, we present the latest experimental results that were achieved after modifications on the mirror-box, the collector and the cooling system of the gyrotron. In particular, it was possible to demonstrate pulses with output power up to 2 MW and pulse lengths up to 50 ms.
{"title":"Operation of the Modular KIT 170 GHz – 2 MW Longer-Pulse Coaxial-Cavity Gyrotron with Pulses up to 50 ms","authors":"Z. Ioannidis, T. Rzesnicki, K. Avramidis, G. Gantenbein, S. Illy, J. Jin, L. Krier, I. Pagonakis, S. Ruess, M. Schmid, M. Thumm, J. Jelonnek","doi":"10.1109/IRMMW-THz46771.2020.9370698","DOIUrl":"https://doi.org/10.1109/IRMMW-THz46771.2020.9370698","url":null,"abstract":"The KIT 170 GHz – 2 MW longer-pulse coaxial-cavity gyrotron is continuously upgraded with the goal to reach 1 s pulses with a modular construction. In this work, we present the latest experimental results that were achieved after modifications on the mirror-box, the collector and the cooling system of the gyrotron. In particular, it was possible to demonstrate pulses with output power up to 2 MW and pulse lengths up to 50 ms.","PeriodicalId":6746,"journal":{"name":"2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"17 1","pages":"01-02"},"PeriodicalIF":0.0,"publicationDate":"2020-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81857440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-11-08DOI: 10.1109/IRMMW-THz46771.2020.9370473
A. Anderson, D. Naylor, A. Huber, B. Gom, T. Fulton, Sudhakar Gunuganti, W. Jellema, I. Veenendaal, P. Ade
Recent advances in far-infrared detector technology have led to increases in raw sensitivity of more than an order of magnitude over previous state-of-the-art detectors. With such sensitivity, photon noise becomes the dominant noise component, even when using cryogenically cooled optics, unless a method of restricting the spectral bandpass is employed. One method is to use a low-resolution diffraction grating spectrometer to post-disperse the signal from a high-resolution instrument, such as a Fourier transform spectrometer (FTS). This concept has been adopted for the SAFARI instrument on the SPICA mission. This paper discusses the development of a prototype cryogenic grating spectrometer that has been used to evaluate the concept of a post-dispersed polarizing FTS over the range from 285-500 μm.
{"title":"Development of a Cryogenic Far-infrared Grating Spectrometer for a Post-dispersed Fourier Transform Spectrometer","authors":"A. Anderson, D. Naylor, A. Huber, B. Gom, T. Fulton, Sudhakar Gunuganti, W. Jellema, I. Veenendaal, P. Ade","doi":"10.1109/IRMMW-THz46771.2020.9370473","DOIUrl":"https://doi.org/10.1109/IRMMW-THz46771.2020.9370473","url":null,"abstract":"Recent advances in far-infrared detector technology have led to increases in raw sensitivity of more than an order of magnitude over previous state-of-the-art detectors. With such sensitivity, photon noise becomes the dominant noise component, even when using cryogenically cooled optics, unless a method of restricting the spectral bandpass is employed. One method is to use a low-resolution diffraction grating spectrometer to post-disperse the signal from a high-resolution instrument, such as a Fourier transform spectrometer (FTS). This concept has been adopted for the SAFARI instrument on the SPICA mission. This paper discusses the development of a prototype cryogenic grating spectrometer that has been used to evaluate the concept of a post-dispersed polarizing FTS over the range from 285-500 μm.","PeriodicalId":6746,"journal":{"name":"2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"23 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2020-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82518568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-11-08DOI: 10.1109/IRMMW-THz46771.2020.9370716
N. Ryskin, G. Torgashov, Roman A. Torgashov, A. Rozhnev, V. Titov, A. Starodubov, A. Ploskih, D. Zolotykh, Valeriy V. Eruelyanov, Igor A. Navotskiy
We present the results of studies aimed at development of multiple-sheet-beam microfabricated traveling-wave tubes (TWT) at sub- THz frequency band. The double-tunnel TWT with a meander-line slow-wave structure (SWS) at V -band and the triple-beam TWT with grating SWS at G-band are designed. Technologies for microfabrication of the SWSs are discussed. The results of SWS fabrication and characterization are presented. Multiple-beam electron-optic system is designed and beam transportation in a uniform magnetic field is studied. The results of 3-D PIC calculation of small-signal and large-signal gain are presented.
{"title":"Development of High-Power Sub-THz Traveling-Wave Tubes with Multiple Sheet Electron Beams","authors":"N. Ryskin, G. Torgashov, Roman A. Torgashov, A. Rozhnev, V. Titov, A. Starodubov, A. Ploskih, D. Zolotykh, Valeriy V. Eruelyanov, Igor A. Navotskiy","doi":"10.1109/IRMMW-THz46771.2020.9370716","DOIUrl":"https://doi.org/10.1109/IRMMW-THz46771.2020.9370716","url":null,"abstract":"We present the results of studies aimed at development of multiple-sheet-beam microfabricated traveling-wave tubes (TWT) at sub- THz frequency band. The double-tunnel TWT with a meander-line slow-wave structure (SWS) at V -band and the triple-beam TWT with grating SWS at G-band are designed. Technologies for microfabrication of the SWSs are discussed. The results of SWS fabrication and characterization are presented. Multiple-beam electron-optic system is designed and beam transportation in a uniform magnetic field is studied. The results of 3-D PIC calculation of small-signal and large-signal gain are presented.","PeriodicalId":6746,"journal":{"name":"2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"210 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2020-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80617882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-11-08DOI: 10.1109/IRMMW-THz46771.2020.9370813
Kou-Tan Li, R. Utaki, Meiling Sun, Y. Kawano
To push forward existing multi-functional terahertz (THz) imaging applications, such as flexible and broadband operation with carbon nanotube (CNT) film-based photo-thermoelectric (PTE) imagers, the high-density pixel integration is essential. This paper proposes a fusion between CNT film absorbers and easily printable flexible thermoelectric modules (TEGs) to design a highly-sensitive, highly-integratable, three-dimensional $pi$-shaped PTE pixel structure. A simple transfer printing enables vertical alignment of Bi2Te3-based PN TEG pairs on a flexible substrate. The CNT film surface channel functions as the efficient heat transfer induced by the external THz irradiation to the vertical TEG structure.
{"title":"A highly-sensitive and highly-integrated flexible broadband imager with 3D printed $pi$-shaped photo-thermoelectric pixel structures","authors":"Kou-Tan Li, R. Utaki, Meiling Sun, Y. Kawano","doi":"10.1109/IRMMW-THz46771.2020.9370813","DOIUrl":"https://doi.org/10.1109/IRMMW-THz46771.2020.9370813","url":null,"abstract":"To push forward existing multi-functional terahertz (THz) imaging applications, such as flexible and broadband operation with carbon nanotube (CNT) film-based photo-thermoelectric (PTE) imagers, the high-density pixel integration is essential. This paper proposes a fusion between CNT film absorbers and easily printable flexible thermoelectric modules (TEGs) to design a highly-sensitive, highly-integratable, three-dimensional $pi$-shaped PTE pixel structure. A simple transfer printing enables vertical alignment of Bi2Te3-based PN TEG pairs on a flexible substrate. The CNT film surface channel functions as the efficient heat transfer induced by the external THz irradiation to the vertical TEG structure.","PeriodicalId":6746,"journal":{"name":"2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"17 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2020-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80772959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-11-08DOI: 10.1109/IRMMW-THz46771.2020.9370520
Guangjiang Li, N. Amer, H. Hafez, Shuohan Huang, D. Turchinovich, V. Mochalin, F. Hegmann, L. Titova
Metallic 2D Ti3C2Ty MXene shows high electrical conductivity and strong absorption of electromagnetic radiation in the THz frequency range. We demonstrate that optical pulses (400nm and 800nm) induce transient broadband THz transparency in this MXene, which lasts for nanoseconds and is independent of temperature from 95 to 290 K. This optically controlled THz electromagnetic interference shielding material could be exploited in future THz communication systems.
{"title":"A Novel THz Electromagnetic Interference Shielding Material: 2D Ti3C2Ty MXene","authors":"Guangjiang Li, N. Amer, H. Hafez, Shuohan Huang, D. Turchinovich, V. Mochalin, F. Hegmann, L. Titova","doi":"10.1109/IRMMW-THz46771.2020.9370520","DOIUrl":"https://doi.org/10.1109/IRMMW-THz46771.2020.9370520","url":null,"abstract":"Metallic 2D Ti3C2Ty MXene shows high electrical conductivity and strong absorption of electromagnetic radiation in the THz frequency range. We demonstrate that optical pulses (400nm and 800nm) induce transient broadband THz transparency in this MXene, which lasts for nanoseconds and is independent of temperature from 95 to 290 K. This optically controlled THz electromagnetic interference shielding material could be exploited in future THz communication systems.","PeriodicalId":6746,"journal":{"name":"2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"36 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2020-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80295858","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-11-08DOI: 10.1109/IRMMW-THz46771.2020.9370599
A. Dunn, D. R. Bacon, T. Gill, J. Freeman, L. Li, P. Dean, E. Linfield, A. Davies, A. Burnett
In this work we discuss the development of a multidimensional terahertz (THz) spectrometer, incorporating a range of THz generation and detection schemes in order to improve the flexibility and practicality of these complex experimental setups.
{"title":"Development of a Broadband Multidimensional THz Spectrometer","authors":"A. Dunn, D. R. Bacon, T. Gill, J. Freeman, L. Li, P. Dean, E. Linfield, A. Davies, A. Burnett","doi":"10.1109/IRMMW-THz46771.2020.9370599","DOIUrl":"https://doi.org/10.1109/IRMMW-THz46771.2020.9370599","url":null,"abstract":"In this work we discuss the development of a multidimensional terahertz (THz) spectrometer, incorporating a range of THz generation and detection schemes in order to improve the flexibility and practicality of these complex experimental setups.","PeriodicalId":6746,"journal":{"name":"2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"41 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2020-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83384810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-11-08DOI: 10.1109/IRMMW-THz46771.2020.9370718
J. Genoud, J. Picard, S. Schaub, S. Jawla, M. Shapiro, R. Temkin
The effect of reflection is studied experimentally on a 110 GHz, 1.2 MW short-pulse gyrotron. The experimental setup allows variation of the reflection from 0 to 35% over a range of gyrotron operating conditions. For high-efficiency operating points, the reflection is causing a decrease of the gyrotron power and is responsible for the excitation of an unwanted transverse mode, suppressing the excitation of the main mode.
{"title":"Studies of the effect from reflection with a short-pulse high-power gyrotron","authors":"J. Genoud, J. Picard, S. Schaub, S. Jawla, M. Shapiro, R. Temkin","doi":"10.1109/IRMMW-THz46771.2020.9370718","DOIUrl":"https://doi.org/10.1109/IRMMW-THz46771.2020.9370718","url":null,"abstract":"The effect of reflection is studied experimentally on a 110 GHz, 1.2 MW short-pulse gyrotron. The experimental setup allows variation of the reflection from 0 to 35% over a range of gyrotron operating conditions. For high-efficiency operating points, the reflection is causing a decrease of the gyrotron power and is responsible for the excitation of an unwanted transverse mode, suppressing the excitation of the main mode.","PeriodicalId":6746,"journal":{"name":"2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"36 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2020-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76367332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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