Pub Date : 2020-11-08DOI: 10.1109/irmmw-thz46771.2020.9370637
{"title":"Full Program","authors":"","doi":"10.1109/irmmw-thz46771.2020.9370637","DOIUrl":"https://doi.org/10.1109/irmmw-thz46771.2020.9370637","url":null,"abstract":"","PeriodicalId":6746,"journal":{"name":"2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82423869","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-THz46771.2020.9370498
L. Razzari
Nanoantennas can be seen as cavities capable of confining free-space radiation into nanoscale mode volumes. A brief summary of our work on the use of such nanostructures for enhanced THz radiation - matter interactions is presented.
{"title":"Nanocavities for Terahertz Light","authors":"L. Razzari","doi":"10.1109/IRMMW-THz46771.2020.9370498","DOIUrl":"https://doi.org/10.1109/IRMMW-THz46771.2020.9370498","url":null,"abstract":"Nanoantennas can be seen as cavities capable of confining free-space radiation into nanoscale mode volumes. A brief summary of our work on the use of such nanostructures for enhanced THz radiation - matter interactions is presented.","PeriodicalId":6746,"journal":{"name":"2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"49 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":"83257297","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-THz46771.2020.9370452
S. Iwamatsu, Naoki Nishigami, Y. Nishida, M. Fujita, T. Nagatsuma
The resonant tunneling diode is a promising candidate as a low-cost and compact electronic device for terahertz wireless communications. This study proposes an oscillator configuration by integrating two resonant tunneling diodes on a single slot-ring antenna for terahertz communications. A coherent oscillation is experimentally demonstrated at 354 GHz, and the results indicate that 25-Gbit/s error-free wireless communication was achieved using the oscillator as a transmitter.
{"title":"Resonant Tunneling Diode Array Oscillator Integrated with Slot-ring Antenna for Terahertz Wireless Communications","authors":"S. Iwamatsu, Naoki Nishigami, Y. Nishida, M. Fujita, T. Nagatsuma","doi":"10.1109/IRMMW-THz46771.2020.9370452","DOIUrl":"https://doi.org/10.1109/IRMMW-THz46771.2020.9370452","url":null,"abstract":"The resonant tunneling diode is a promising candidate as a low-cost and compact electronic device for terahertz wireless communications. This study proposes an oscillator configuration by integrating two resonant tunneling diodes on a single slot-ring antenna for terahertz communications. A coherent oscillation is experimentally demonstrated at 354 GHz, and the results indicate that 25-Gbit/s error-free wireless communication was achieved using the oscillator as a transmitter.","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":"89712370","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-THz46771.2020.9370615
B. Kuchhal, E. Snively, K. Multani, H. Stokowski, D. Das, A. Safavi-Naeni, P. Welander, E. Nanni
Ongoing progress in the development of superconducting microwave circuits has highlighted the additional vital challenge of transmitting quantum information robustly. As a practical solution to this problem, we propose to propagate a low loss (∼ −0.004 dB/m) TM Sommerfeld mode on the surface of a superconducting niobium wire held between transmitters and receivers or between different quantum systems. Here we present simulations performed in ANSYS-HFSS pertaining to this mode along with the theoretical results obtained for a niobium wire at THz frequencies and temperatures of a few Kelvin.
{"title":"Low-Loss THz Sommerfeld Mode on a Superconducting Niobium Wire for Millimeter-Wave Interconnects","authors":"B. Kuchhal, E. Snively, K. Multani, H. Stokowski, D. Das, A. Safavi-Naeni, P. Welander, E. Nanni","doi":"10.1109/IRMMW-THz46771.2020.9370615","DOIUrl":"https://doi.org/10.1109/IRMMW-THz46771.2020.9370615","url":null,"abstract":"Ongoing progress in the development of superconducting microwave circuits has highlighted the additional vital challenge of transmitting quantum information robustly. As a practical solution to this problem, we propose to propagate a low loss (∼ −0.004 dB/m) TM Sommerfeld mode on the surface of a superconducting niobium wire held between transmitters and receivers or between different quantum systems. Here we present simulations performed in ANSYS-HFSS pertaining to this mode along with the theoretical results obtained for a niobium wire at THz frequencies and temperatures of a few Kelvin.","PeriodicalId":6746,"journal":{"name":"2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"38 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":"86717692","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-THz46771.2020.9370371
A. Jumaah, S. Al-Daffaie, T. Kusserow, I. Monroy
New CW THz detectors based on graphene nanoelectrodes photomixer are completely investigated. The graphene nanoelectrodes are placed on low-temperature-grown (LTG) GaAs as photoconductive material. Due to the high transparency and high conductivity of graphene, increasing carrier densities were obtained which leads to the high performance detection of THz induced photocurrent being one order of magnitude higher than for conventional metallic interdigitated photomixer. The THz measurement was performed in the range of 50 GHz to 1.1 THz.
{"title":"High Performance Graphene-Based CW THz Photoconductive Detector","authors":"A. Jumaah, S. Al-Daffaie, T. Kusserow, I. Monroy","doi":"10.1109/IRMMW-THz46771.2020.9370371","DOIUrl":"https://doi.org/10.1109/IRMMW-THz46771.2020.9370371","url":null,"abstract":"New CW THz detectors based on graphene nanoelectrodes photomixer are completely investigated. The graphene nanoelectrodes are placed on low-temperature-grown (LTG) GaAs as photoconductive material. Due to the high transparency and high conductivity of graphene, increasing carrier densities were obtained which leads to the high performance detection of THz induced photocurrent being one order of magnitude higher than for conventional metallic interdigitated photomixer. The THz measurement was performed in the range of 50 GHz to 1.1 THz.","PeriodicalId":6746,"journal":{"name":"2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"40 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":"86426065","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-THz46771.2020.9370622
S. Schönhuber, M. Kainz, B. Limbacher, M. Wenclawiak, A. Andrews, G. Strasser, J. Darmo, K. Unterrainer
The control of the output beam shape and direction of THz Quantum Cascade Lasers is presented. For the improvement of the operation temperature different barrier heights are investigated. As result a very efficient device is realized which requires only thermo-electric cooling and thus can be integrated into compact gas spectroscopy systems.
{"title":"Controlling and shaping the THz emission from Quantum Cascade Lasers","authors":"S. Schönhuber, M. Kainz, B. Limbacher, M. Wenclawiak, A. Andrews, G. Strasser, J. Darmo, K. Unterrainer","doi":"10.1109/IRMMW-THz46771.2020.9370622","DOIUrl":"https://doi.org/10.1109/IRMMW-THz46771.2020.9370622","url":null,"abstract":"The control of the output beam shape and direction of THz Quantum Cascade Lasers is presented. For the improvement of the operation temperature different barrier heights are investigated. As result a very efficient device is realized which requires only thermo-electric cooling and thus can be integrated into compact gas spectroscopy systems.","PeriodicalId":6746,"journal":{"name":"2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"62 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2020-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88982044","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-THz46771.2020.9370982
Yue Shen, Anthony D. Kim, Mohammad Shahili, C. Curwen, S. Addamane, J. Reno, B. Williams
We present direct measurements using reflection-mode terahertz (THz) time domain spectroscopy (TDS) of amplifying quantum-cascade (QC) metasurfaces used in THz QC-VECSELs. Devices resonant at 2.2 and 2.5 THz are studied under different bias currents, and exhibit gain-induced partial compensation of losses.
{"title":"THz Time-Domain Characterization of Amplifying Quantum-Cascade Metasurface","authors":"Yue Shen, Anthony D. Kim, Mohammad Shahili, C. Curwen, S. Addamane, J. Reno, B. Williams","doi":"10.1109/IRMMW-THz46771.2020.9370982","DOIUrl":"https://doi.org/10.1109/IRMMW-THz46771.2020.9370982","url":null,"abstract":"We present direct measurements using reflection-mode terahertz (THz) time domain spectroscopy (TDS) of amplifying quantum-cascade (QC) metasurfaces used in THz QC-VECSELs. Devices resonant at 2.2 and 2.5 THz are studied under different bias currents, and exhibit gain-induced partial compensation of losses.","PeriodicalId":6746,"journal":{"name":"2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"51 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":"83605743","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-THz46771.2020.9370990
S. Hashizume, Y. Monnai
We present a method for measuring water content in a sample using CW terahertz reflectometry. A Vector Network Analyzer (VNA) is used to irradiate a 300 GHz band terahertz wave to a wet sample, and the complex reflection coefficient is measured. The temporal change of the water content is thus observed by analyzing the change of the complex reflection coefficient. By fitting the measurement result with a multi-reflection model, we experimentally confirmed the observation of the moisture change on a paper sample.
{"title":"Non-contact inspection of Moisture Change Based on CW Terahertz Reflectometry","authors":"S. Hashizume, Y. Monnai","doi":"10.1109/IRMMW-THz46771.2020.9370990","DOIUrl":"https://doi.org/10.1109/IRMMW-THz46771.2020.9370990","url":null,"abstract":"We present a method for measuring water content in a sample using CW terahertz reflectometry. A Vector Network Analyzer (VNA) is used to irradiate a 300 GHz band terahertz wave to a wet sample, and the complex reflection coefficient is measured. The temporal change of the water content is thus observed by analyzing the change of the complex reflection coefficient. By fitting the measurement result with a multi-reflection model, we experimentally confirmed the observation of the moisture change on a paper sample.","PeriodicalId":6746,"journal":{"name":"2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"07 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":"83616932","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-THz46771.2020.9370646
J. Beckmann, L. Puskar, E. Ritter, U. Schade
A specially developed experimental set up has been integrated into a commercially available FT IR Spectrometer to study the curing of Epoxy Systems. MIR and FIR spectra measured during the curing process at different temperatures of an epoxy system will be presented in dependency of the curing time. The experiments and the selected set up are discussed to demonstrate its potential for future monitoring and ageing control applications during a manufacturing process of polymer composites.
{"title":"Novel Technique for On-Line Monitoring of the Curing Process of Fiber Reinforced Polymer Composites","authors":"J. Beckmann, L. Puskar, E. Ritter, U. Schade","doi":"10.1109/IRMMW-THz46771.2020.9370646","DOIUrl":"https://doi.org/10.1109/IRMMW-THz46771.2020.9370646","url":null,"abstract":"A specially developed experimental set up has been integrated into a commercially available FT IR Spectrometer to study the curing of Epoxy Systems. MIR and FIR spectra measured during the curing process at different temperatures of an epoxy system will be presented in dependency of the curing time. The experiments and the selected set up are discussed to demonstrate its potential for future monitoring and ageing control applications during a manufacturing process of polymer composites.","PeriodicalId":6746,"journal":{"name":"2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"140 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":"77520093","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-THz46771.2020.9370572
I. Nefedova, Qiushuo Sun, A. Moradikouchi, M. Baggio, A. Tamminen, J. Ala-Laurinaho, E. MacPherson, H. Rodilla, J. Stake, Z. Taylor
THz-reflection spectroscopy was used to extract time-varying water gradients in drying paper targets mounted on electrically thick dielectric substrates. The data showed a pronounced and prolonged drop below dry reflectivity when the water content that peaks at low weight (∼10%). A binomial distribution fitted to the acquired data confirms the existence of the time-varying water content gradient and suggests aqueous thin film hydration can be quantified even when the contrast between the film and backing material is low.
{"title":"THz Frequency Quantification of Water Gradients in Drying Paper","authors":"I. Nefedova, Qiushuo Sun, A. Moradikouchi, M. Baggio, A. Tamminen, J. Ala-Laurinaho, E. MacPherson, H. Rodilla, J. Stake, Z. Taylor","doi":"10.1109/IRMMW-THz46771.2020.9370572","DOIUrl":"https://doi.org/10.1109/IRMMW-THz46771.2020.9370572","url":null,"abstract":"THz-reflection spectroscopy was used to extract time-varying water gradients in drying paper targets mounted on electrically thick dielectric substrates. The data showed a pronounced and prolonged drop below dry reflectivity when the water content that peaks at low weight (∼10%). A binomial distribution fitted to the acquired data confirms the existence of the time-varying water content gradient and suggests aqueous thin film hydration can be quantified even when the contrast between the film and backing material is low.","PeriodicalId":6746,"journal":{"name":"2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"57 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":"76930769","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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