Pub Date : 2021-08-29DOI: 10.1109/IRMMW-THz50926.2021.9566910
P. Gusikhin, I. V. Andreev, V. Muravev, J. Gospodarič, A. Pimenov, I. Kukushkin
Phase waveplates for THz beam shaping were developed, calculated, and implemented. Developed phase plates could be 3D-printed from commercially available polymers, which makes them affordable and fully customized. These waveplates allow to widely and easily manipulate THz beam shape.
{"title":"THz phase waveplates for beam shaping","authors":"P. Gusikhin, I. V. Andreev, V. Muravev, J. Gospodarič, A. Pimenov, I. Kukushkin","doi":"10.1109/IRMMW-THz50926.2021.9566910","DOIUrl":"https://doi.org/10.1109/IRMMW-THz50926.2021.9566910","url":null,"abstract":"Phase waveplates for THz beam shaping were developed, calculated, and implemented. Developed phase plates could be 3D-printed from commercially available polymers, which makes them affordable and fully customized. These waveplates allow to widely and easily manipulate THz beam shape.","PeriodicalId":6852,"journal":{"name":"2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz)","volume":"85 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2021-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81097034","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 : 2021-08-29DOI: 10.1109/IRMMW-THz50926.2021.9567471
Xiongbin Yu, T. Miyagawa, Yusei Suzuki, M. Ta, S. Suzuki, M. Asada
Resonant tunneling diode (RTD) terahertz oscillator without a metal–insulator–metal (MIM) capacitor offers easy deployment. Here, we propose RTD oscillators using different perimeters of square split ring resonators (SRRs) without MIM capacitors. The RTD is integrated into the center split gap of the SRR. Coplanar stripline antennas are integrated with the SRR to increase the output power. The highest measured oscillation frequency is 1.22 THz with an output power of ~7 µW.
{"title":"Perimeter Dependence of Oscillation Frequency Property of Resonant Tunneling Diode Terahertz Oscillator Using Split Ring Resonator","authors":"Xiongbin Yu, T. Miyagawa, Yusei Suzuki, M. Ta, S. Suzuki, M. Asada","doi":"10.1109/IRMMW-THz50926.2021.9567471","DOIUrl":"https://doi.org/10.1109/IRMMW-THz50926.2021.9567471","url":null,"abstract":"Resonant tunneling diode (RTD) terahertz oscillator without a metal–insulator–metal (MIM) capacitor offers easy deployment. Here, we propose RTD oscillators using different perimeters of square split ring resonators (SRRs) without MIM capacitors. The RTD is integrated into the center split gap of the SRR. Coplanar stripline antennas are integrated with the SRR to increase the output power. The highest measured oscillation frequency is 1.22 THz with an output power of ~7 µW.","PeriodicalId":6852,"journal":{"name":"2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz)","volume":"53 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2021-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81241950","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 : 2021-08-29DOI: 10.1109/IRMMW-THz50926.2021.9566975
E. Javadi, D. But, K. Ikamas, W. Knap, A. Lisauskas
This contribution presents an overview of main methods what are currently used for the sensitivity, i.e., responsivity and noise equivalent power determination of state-of-the-art antenna-coupled field-effect-transistor-based THz detectors/sensors. We show that, the reported results strongly depend on the sensor effective area determination method, especially if it is not unambiguously determined leading to up to orders of magnitude discrepancy. Furthermore we illustrate our statements by presenting results of characterisation of detectors which are coupled with different antennas and presenting state-of-the-art sensitivity values.
{"title":"Review of methods for performance evaluation of antenna-coupled THz detectors","authors":"E. Javadi, D. But, K. Ikamas, W. Knap, A. Lisauskas","doi":"10.1109/IRMMW-THz50926.2021.9566975","DOIUrl":"https://doi.org/10.1109/IRMMW-THz50926.2021.9566975","url":null,"abstract":"This contribution presents an overview of main methods what are currently used for the sensitivity, i.e., responsivity and noise equivalent power determination of state-of-the-art antenna-coupled field-effect-transistor-based THz detectors/sensors. We show that, the reported results strongly depend on the sensor effective area determination method, especially if it is not unambiguously determined leading to up to orders of magnitude discrepancy. Furthermore we illustrate our statements by presenting results of characterisation of detectors which are coupled with different antennas and presenting state-of-the-art sensitivity values.","PeriodicalId":6852,"journal":{"name":"2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz)","volume":"1 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2021-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78472903","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 : 2021-08-29DOI: 10.1109/IRMMW-THz50926.2021.9567322
Luqi Zhang, Yi Jiang, Wenqiang Lei, Rui Song, Peng Hu, Guowu Ma
A W-band traveling-wave tube (TWT) by utilizing the folded waveguide slow wave structure (FWSWS) combined with the pencil beam is designed to develop the high power millimeter-wave radiation source. The particle-in-cell (PIC) simulation results show that this TWT can produce over 158W output power in the range from 90GHz to 97GHz. The maximum output power of the TWT can reach 293W at the typical frequency of 94GHz, which corresponds to a gain of 37.68dB and an interaction efficiency of 8.15%.
{"title":"Design of W-band Folded Waveguide Traveling-Wave Tube","authors":"Luqi Zhang, Yi Jiang, Wenqiang Lei, Rui Song, Peng Hu, Guowu Ma","doi":"10.1109/IRMMW-THz50926.2021.9567322","DOIUrl":"https://doi.org/10.1109/IRMMW-THz50926.2021.9567322","url":null,"abstract":"A W-band traveling-wave tube (TWT) by utilizing the folded waveguide slow wave structure (FWSWS) combined with the pencil beam is designed to develop the high power millimeter-wave radiation source. The particle-in-cell (PIC) simulation results show that this TWT can produce over 158W output power in the range from 90GHz to 97GHz. The maximum output power of the TWT can reach 293W at the typical frequency of 94GHz, which corresponds to a gain of 37.68dB and an interaction efficiency of 8.15%.","PeriodicalId":6852,"journal":{"name":"2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz)","volume":"20 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2021-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77462320","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 : 2021-08-29DOI: 10.1109/IRMMW-THz50926.2021.9567364
V. Parshin, Evgeny S. Semenov, E. Serov, V. Zapevalov, A. Zuev
In sub-THz and THz gyrotrons with oversized cavities, there is the problem of implementation of stable single-mode generation in modes, operating at high cyclotron harmonics. It is shown that a high fraction of ohmic losses in sub-THz and THz gyrotrons affects not only the efficiency and output power, but also affects the stability of the operating regime. A cooling the gyrotron cavity to cryogenic (nitrogen) temperatures as one of the promising methods for reducing ohmic losses in terahertz gyrotrons is considered.
{"title":"Method to decrease ohmic losses in cavities of low-power terahertz gyrotrons","authors":"V. Parshin, Evgeny S. Semenov, E. Serov, V. Zapevalov, A. Zuev","doi":"10.1109/IRMMW-THz50926.2021.9567364","DOIUrl":"https://doi.org/10.1109/IRMMW-THz50926.2021.9567364","url":null,"abstract":"In sub-THz and THz gyrotrons with oversized cavities, there is the problem of implementation of stable single-mode generation in modes, operating at high cyclotron harmonics. It is shown that a high fraction of ohmic losses in sub-THz and THz gyrotrons affects not only the efficiency and output power, but also affects the stability of the operating regime. A cooling the gyrotron cavity to cryogenic (nitrogen) temperatures as one of the promising methods for reducing ohmic losses in terahertz gyrotrons is considered.","PeriodicalId":6852,"journal":{"name":"2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz)","volume":"421 3 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2021-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77850400","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 : 2021-08-29DOI: 10.1109/IRMMW-THz50926.2021.9566938
A. Abbes, P. Lu, P. Nouvel, A. Pénarier, L. Varani, G. Beaudoin, I. Sagnes, A. Garnache, M. Jarrahi, S. Blin
We report the first THz emission at 280 GHz excited by a Continuous-Wave Dual-Frequency Vertical-External-Cavity Semiconductor Laser emitting at 1064 nm and using a long carrier-lifetime plasmonic-based photomixer. These encouraging results pave the way toward coherent, tunable, compact, powerful, and low-cost terahertz sources working at room temperature.
{"title":"280 GHz Radiation Source Driven by a 1064nm Continuous-Wave Dual-Frequency Vertical External Cavity Semiconductor Laser","authors":"A. Abbes, P. Lu, P. Nouvel, A. Pénarier, L. Varani, G. Beaudoin, I. Sagnes, A. Garnache, M. Jarrahi, S. Blin","doi":"10.1109/IRMMW-THz50926.2021.9566938","DOIUrl":"https://doi.org/10.1109/IRMMW-THz50926.2021.9566938","url":null,"abstract":"We report the first THz emission at 280 GHz excited by a Continuous-Wave Dual-Frequency Vertical-External-Cavity Semiconductor Laser emitting at 1064 nm and using a long carrier-lifetime plasmonic-based photomixer. These encouraging results pave the way toward coherent, tunable, compact, powerful, and low-cost terahertz sources working at room temperature.","PeriodicalId":6852,"journal":{"name":"2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz)","volume":"10 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2021-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77953171","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 : 2021-08-29DOI: 10.1109/IRMMW-THz50926.2021.9567244
V. Janonis, R. Balagula, P. Prystawko, I. Kašalynas
Record high spatial coherence values up to 87λ (130λ) in experiment (theory) were reported for polarized emission of surface plasmon-phonon polaritons excited in shallow surface relief n-GaN grating. Unusual independence of quality factor and dependence of spatial coherence length on the grating wavevector were observed in the course of a thorough investigation of dispersion characteristics of these quasiparticles.
{"title":"Investigation of spatial coherence of hybrid surface plasmon-phonon-polaritons in n-GaN gratings","authors":"V. Janonis, R. Balagula, P. Prystawko, I. Kašalynas","doi":"10.1109/IRMMW-THz50926.2021.9567244","DOIUrl":"https://doi.org/10.1109/IRMMW-THz50926.2021.9567244","url":null,"abstract":"Record high spatial coherence values up to 87λ (130λ) in experiment (theory) were reported for polarized emission of surface plasmon-phonon polaritons excited in shallow surface relief n-GaN grating. Unusual independence of quality factor and dependence of spatial coherence length on the grating wavevector were observed in the course of a thorough investigation of dispersion characteristics of these quasiparticles.","PeriodicalId":6852,"journal":{"name":"2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz)","volume":"29 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2021-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77956681","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 : 2021-08-29DOI: 10.1109/IRMMW-THz50926.2021.9567640
Wenjie Zhang, Yunkun Yang, Peng Suo, Xian Lin, F. Xiu, G. Ma
In this work, we use optical pump-terahertz (THz) probe spectroscopy to investigated the impurity-induced topological phase transition and the photo-induced carrier behavior in cadmium arsenide (Cd3As2), a three-dimensional Dirac semimetal. By comparing the dynamics of different temperature and pump fluence, we discuss the carrier dynamics and physical mechanism caused by impurity.
{"title":"Impurity-modulated ultrafast carrier dynamics in 3D Dirac semimetal Cd3As2","authors":"Wenjie Zhang, Yunkun Yang, Peng Suo, Xian Lin, F. Xiu, G. Ma","doi":"10.1109/IRMMW-THz50926.2021.9567640","DOIUrl":"https://doi.org/10.1109/IRMMW-THz50926.2021.9567640","url":null,"abstract":"In this work, we use optical pump-terahertz (THz) probe spectroscopy to investigated the impurity-induced topological phase transition and the photo-induced carrier behavior in cadmium arsenide (Cd3As2), a three-dimensional Dirac semimetal. By comparing the dynamics of different temperature and pump fluence, we discuss the carrier dynamics and physical mechanism caused by impurity.","PeriodicalId":6852,"journal":{"name":"2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz)","volume":"103 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2021-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73356006","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 : 2021-08-29DOI: 10.1109/IRMMW-THz50926.2021.9567352
R. Polito, A. Occhicone, M. Pea, V. Giliberti, A. Sinibaldi, F. Mattioli, S. Cibella, A. Notargiacomo, A. Nucara, P. Biagioni, F. Michelotti, M. Ortolani, L. Baldassarre
We report on the design, fabrication, and spectroscopic characterization of a 1D Photonic Cristal (1DPC) sustaining Bloch Surface Waves (BSWs) in the mid-infrared. The reported all-dielectric 1DPC structure shows potential for label-free biosensing applications to medical diagnostics.
{"title":"Mid-Infrared Bloch Surface Waves for biosensing applications","authors":"R. Polito, A. Occhicone, M. Pea, V. Giliberti, A. Sinibaldi, F. Mattioli, S. Cibella, A. Notargiacomo, A. Nucara, P. Biagioni, F. Michelotti, M. Ortolani, L. Baldassarre","doi":"10.1109/IRMMW-THz50926.2021.9567352","DOIUrl":"https://doi.org/10.1109/IRMMW-THz50926.2021.9567352","url":null,"abstract":"We report on the design, fabrication, and spectroscopic characterization of a 1D Photonic Cristal (1DPC) sustaining Bloch Surface Waves (BSWs) in the mid-infrared. The reported all-dielectric 1DPC structure shows potential for label-free biosensing applications to medical diagnostics.","PeriodicalId":6852,"journal":{"name":"2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz)","volume":"23 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2021-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79870216","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 : 2021-08-29DOI: 10.1109/IRMMW-THz50926.2021.9567205
T. Hosotani, A. Satou, T. Otsuji
We experimentally observed photomixed THz emission from a dual-grating-gate high-electron-mobility transistor under different bias conditions at 120 K with irradiating photomixed dual-CW-IR laser beams. The observed emission spectral peak frequencies meet well to the theoretical calculations for plasmon mode frequencies, suggesting the photomixed THz emission is amplified by the DC-current-driven plasmonic boom type instability when the electron drift velocity exceeds the plasmon velocity at the plasmon cavity boundary.
{"title":"THz Emission in a Dual-Grating-Gate HEMT Promoted by the Plasmonic Boom Instability","authors":"T. Hosotani, A. Satou, T. Otsuji","doi":"10.1109/IRMMW-THz50926.2021.9567205","DOIUrl":"https://doi.org/10.1109/IRMMW-THz50926.2021.9567205","url":null,"abstract":"We experimentally observed photomixed THz emission from a dual-grating-gate high-electron-mobility transistor under different bias conditions at 120 K with irradiating photomixed dual-CW-IR laser beams. The observed emission spectral peak frequencies meet well to the theoretical calculations for plasmon mode frequencies, suggesting the photomixed THz emission is amplified by the DC-current-driven plasmonic boom type instability when the electron drift velocity exceeds the plasmon velocity at the plasmon cavity boundary.","PeriodicalId":6852,"journal":{"name":"2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz)","volume":"21 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2021-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80344837","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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