Pub Date : 2019-09-01DOI: 10.1109/IRMMW-THz.2019.8874519
V. Giliberti, R. Polito, E. Ritter, M. Broser, P. Hegemann, L. Puskar, U. Schade, L. Zanetti‐Polzi, I. Daidone, S. Corni, F. Rusconi, P. Biagioni, L. Baldassarre, M. Ortolani
Conformational changes of the light-sensitive membrane receptor and proton pump bacteriorhodopsin is investigated by tip-enhanced mid-infrared nanospectroscopy on individual cell membrane patches, with a dramatic increase of sensitivity (in terms of number of probed molecules) compared with standard mid-infrared spectroscopy.
{"title":"Difference mid-IR nanospectroscopy on individual patches of purple membranes: the proton pump activity of bacteriorhodopsin at the nanoscale","authors":"V. Giliberti, R. Polito, E. Ritter, M. Broser, P. Hegemann, L. Puskar, U. Schade, L. Zanetti‐Polzi, I. Daidone, S. Corni, F. Rusconi, P. Biagioni, L. Baldassarre, M. Ortolani","doi":"10.1109/IRMMW-THz.2019.8874519","DOIUrl":"https://doi.org/10.1109/IRMMW-THz.2019.8874519","url":null,"abstract":"Conformational changes of the light-sensitive membrane receptor and proton pump bacteriorhodopsin is investigated by tip-enhanced mid-infrared nanospectroscopy on individual cell membrane patches, with a dramatic increase of sensitivity (in terms of number of probed molecules) compared with standard mid-infrared spectroscopy.","PeriodicalId":6686,"journal":{"name":"2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"17 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78681606","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 : 2019-09-01DOI: 10.1109/IRMMW-THz.2019.8874156
G. Sominskii, V. Sezonov, S. Taradaev
This paper presents the results of study of multilayer emitters consisted from the hafnium and platinum layers. The operation of sheet and annular in cross section cathodes in technical vacuum is demonstrated. Investigated cathodes provide high currents of field emission at emission currents density up to 200 - 400 A/cm2.
{"title":"Formation of high-density electron flows by electron-optical systems with multilayer field emitters.","authors":"G. Sominskii, V. Sezonov, S. Taradaev","doi":"10.1109/IRMMW-THz.2019.8874156","DOIUrl":"https://doi.org/10.1109/IRMMW-THz.2019.8874156","url":null,"abstract":"This paper presents the results of study of multilayer emitters consisted from the hafnium and platinum layers. The operation of sheet and annular in cross section cathodes in technical vacuum is demonstrated. Investigated cathodes provide high currents of field emission at emission currents density up to 200 - 400 A/cm2.","PeriodicalId":6686,"journal":{"name":"2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"64 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78865124","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 : 2019-09-01DOI: 10.1109/IRMMW-THz.2019.8874027
L. Rong, B. Li, D. Wang, Y. Wang, J. Zhao, X. Shi
We report a continuous-wave terahertz computed tomography using Bessel beam generated by the axicon. Two-dimensional cross-sectional images of the internal structure of plastic pipes at different distances are reconstructed by using the filtered back projection algorithm. Compared with conventional Gaussian beam, Bessel beam can extend the depth of field and improve the fidelity of the reconstruction.
{"title":"Continuous-wave Terahertz Computed Tomography Based on Bessel Beam","authors":"L. Rong, B. Li, D. Wang, Y. Wang, J. Zhao, X. Shi","doi":"10.1109/IRMMW-THz.2019.8874027","DOIUrl":"https://doi.org/10.1109/IRMMW-THz.2019.8874027","url":null,"abstract":"We report a continuous-wave terahertz computed tomography using Bessel beam generated by the axicon. Two-dimensional cross-sectional images of the internal structure of plastic pipes at different distances are reconstructed by using the filtered back projection algorithm. Compared with conventional Gaussian beam, Bessel beam can extend the depth of field and improve the fidelity of the reconstruction.","PeriodicalId":6686,"journal":{"name":"2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"3 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75965474","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 : 2019-09-01DOI: 10.1109/IRMMW-THz.2019.8877588
G. Mariani, M. Kenyon, B. Eom, B. Drouin, M. White
This work presents focal plane modules for Polar Radiant Energy in the Far InfraRed Experiment, a passive remote-sensing instrument aimed to determine errors in the estimated outgoing longwave radiation in the Earth’s polar regions to reduce uncertainties in surface emissivity, mass balance, and ice flux. The focal plane arrays are micromachined at JPL and integrated into sub-assembly modules to be mounted on the optical telescope of the instrument.
{"title":"Far-Infrared Room-Temperature Focal Plane Modules for Polar Radiant Energy in the Far InfraRed Experiment","authors":"G. Mariani, M. Kenyon, B. Eom, B. Drouin, M. White","doi":"10.1109/IRMMW-THz.2019.8877588","DOIUrl":"https://doi.org/10.1109/IRMMW-THz.2019.8877588","url":null,"abstract":"This work presents focal plane modules for Polar Radiant Energy in the Far InfraRed Experiment, a passive remote-sensing instrument aimed to determine errors in the estimated outgoing longwave radiation in the Earth’s polar regions to reduce uncertainties in surface emissivity, mass balance, and ice flux. The focal plane arrays are micromachined at JPL and integrated into sub-assembly modules to be mounted on the optical telescope of the instrument.","PeriodicalId":6686,"journal":{"name":"2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"32 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76080324","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 : 2019-09-01DOI: 10.1109/IRMMW-THz.2019.8874105
James P. Anderson, J. Doane, H. Grunloh, M. Brookman
Technology developed in the pursuit of fusion energy has had an impact in many other industries. The requirements being met by advanced microwave and millimeter wave components for fusion applications can open up whole new areas in emerging industries. For plasma heating, microwave components such as waveguide, switches, and polarizers, are being built which can withstand megawatts of sustained power at frequencies up to 170 GHz. In microwave-based diagnostics for fusion systems, enormous frequency bandwidths such as 35–170 GHz are possible for transmission lines at very high propagation efficiency (<% loss over 100 m). The techniques and materials being developed for these systems are transferrable to other microwave-based applications.
{"title":"Beyond Fusion: The Application of Fusion-Based Microwave Technology to Other Industries","authors":"James P. Anderson, J. Doane, H. Grunloh, M. Brookman","doi":"10.1109/IRMMW-THz.2019.8874105","DOIUrl":"https://doi.org/10.1109/IRMMW-THz.2019.8874105","url":null,"abstract":"Technology developed in the pursuit of fusion energy has had an impact in many other industries. The requirements being met by advanced microwave and millimeter wave components for fusion applications can open up whole new areas in emerging industries. For plasma heating, microwave components such as waveguide, switches, and polarizers, are being built which can withstand megawatts of sustained power at frequencies up to 170 GHz. In microwave-based diagnostics for fusion systems, enormous frequency bandwidths such as 35–170 GHz are possible for transmission lines at very high propagation efficiency (<% loss over 100 m). The techniques and materials being developed for these systems are transferrable to other microwave-based applications.","PeriodicalId":6686,"journal":{"name":"2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"65 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87802035","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 : 2019-09-01DOI: 10.1109/IRMMW-THz.2019.8873754
A. Nikoghosyan, J. Shen, H. Ting
The physical properties of human jawbone, spongy bone, collagen and the human bone substitute Cerabone® have been investigated in vitro using terahertz (THz) time-domain spectroscopy (TDS). The refractive indices n(f) and linear absorption coefficients $alpha $(f) of collagen, bone tissue and transplantation material have been determined within the range of the spectrum between 0.2 THz and 2.5 THz. The obtained results allow us to determine the proximity of the physical properties of the Cerabone® bone transplantation material with the natural bone matrix.
{"title":"Physical Properties of Human Jawbone, Spongy Bone, Collagen and Cerabone® Bone Transplantation Material in Range of 0.2 to 2.5 THz","authors":"A. Nikoghosyan, J. Shen, H. Ting","doi":"10.1109/IRMMW-THz.2019.8873754","DOIUrl":"https://doi.org/10.1109/IRMMW-THz.2019.8873754","url":null,"abstract":"The physical properties of human jawbone, spongy bone, collagen and the human bone substitute Cerabone® have been investigated in vitro using terahertz (THz) time-domain spectroscopy (TDS). The refractive indices n(f) and linear absorption coefficients $alpha $(f) of collagen, bone tissue and transplantation material have been determined within the range of the spectrum between 0.2 THz and 2.5 THz. The obtained results allow us to determine the proximity of the physical properties of the Cerabone® bone transplantation material with the natural bone matrix.","PeriodicalId":6686,"journal":{"name":"2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"19 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87118281","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 : 2019-09-01DOI: 10.1109/IRMMW-THz.2019.8873927
D. Dancila, B. Beuerle, U. Shah, J. Oberhammer, A. Rydberg
A leaky wave antenna composed of eight slots in a gold metallised silicon micromachined waveguide was designed, fabricated and measured at 300 GHz. The measured results are in good agreement with the simulations.
{"title":"Leaky Wave Antenna at 300 GHz in Silicon Micromachined Waveguide Technology","authors":"D. Dancila, B. Beuerle, U. Shah, J. Oberhammer, A. Rydberg","doi":"10.1109/IRMMW-THz.2019.8873927","DOIUrl":"https://doi.org/10.1109/IRMMW-THz.2019.8873927","url":null,"abstract":"A leaky wave antenna composed of eight slots in a gold metallised silicon micromachined waveguide was designed, fabricated and measured at 300 GHz. The measured results are in good agreement with the simulations.","PeriodicalId":6686,"journal":{"name":"2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"8 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87540695","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 : 2019-09-01DOI: 10.1109/IRMMW-THz.2019.8873751
Haotian Zhu, J. Valentin, T. Vacelet, E. Herth, Y. Delorme, M. Wiedner
A 2 x 2 local oscillator beam divider for pumping a hot electron bolometer mixer array is designed at 1370 GHz. Traditional rectangular waveguide based H-plane and E-plane junctions are used to construct the feeding network. Two 400-μm thick silicon wafers are used to build the feeding network, and an aluminum plate is used to build the circular horn array. Multilayer micromachining and multilayer stack assembling are the two key technologies employed in building this beam divider.
{"title":"A 2 x 2 Beam Divider for an array local oscillator at 1.37 THz","authors":"Haotian Zhu, J. Valentin, T. Vacelet, E. Herth, Y. Delorme, M. Wiedner","doi":"10.1109/IRMMW-THz.2019.8873751","DOIUrl":"https://doi.org/10.1109/IRMMW-THz.2019.8873751","url":null,"abstract":"A 2 x 2 local oscillator beam divider for pumping a hot electron bolometer mixer array is designed at 1370 GHz. Traditional rectangular waveguide based H-plane and E-plane junctions are used to construct the feeding network. Two 400-μm thick silicon wafers are used to build the feeding network, and an aluminum plate is used to build the circular horn array. Multilayer micromachining and multilayer stack assembling are the two key technologies employed in building this beam divider.","PeriodicalId":6686,"journal":{"name":"2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"48 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87579388","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 : 2019-09-01DOI: 10.1109/IRMMW-THz.2019.8873701
A. Calabrese, Y. Todorov, D. Gacemi, M. Jeannin, S. Suffit, A. Vasanelli, C. Sirtori
We will present a THz electromechanical meta-atom that can be used as a fast, room-temperature detector for THz waves. Contrary to the majority of infrared and THz electromechanical devices, our meta-atom is based on electric interactions instead of photothermal forces. We can thus overcome the finite response time imposed by heat diffusion and realize detectors with virtually no upper limit in the modulation bandwidth.
{"title":"THz detectors based on electromechanical meta-atoms","authors":"A. Calabrese, Y. Todorov, D. Gacemi, M. Jeannin, S. Suffit, A. Vasanelli, C. Sirtori","doi":"10.1109/IRMMW-THz.2019.8873701","DOIUrl":"https://doi.org/10.1109/IRMMW-THz.2019.8873701","url":null,"abstract":"We will present a THz electromechanical meta-atom that can be used as a fast, room-temperature detector for THz waves. Contrary to the majority of infrared and THz electromechanical devices, our meta-atom is based on electric interactions instead of photothermal forces. We can thus overcome the finite response time imposed by heat diffusion and realize detectors with virtually no upper limit in the modulation bandwidth.","PeriodicalId":6686,"journal":{"name":"2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"75 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86167645","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 : 2019-09-01DOI: 10.1109/IRMMW-THz.2019.8874550
V. Gavrilenko, S. Morozov, V. Rumyantsev, M. Fadeev, V. Utochkin, N. Kulikov, A. A. Dubinov, V. Aleshkin, N. Mikhailov, S. Dvoretskii, F. Teppe, C. Sirtori
Stimulated emission (SE) at wavelengths up to 24 μm (12.5 THz) and down to 2.8 μm is demonstrated from HgCdTe quantum well (QW) heterostructures. Non-radiative Auger recombination is show to be mitigated due to relativistic energy spectrum. Pump-probe carrier lifetime measurements show that further increase in SE wavelength is feasible up to 60 μm (5 THz). In the short wavelength range SE down to 2.8 μm is demonstrated at temperatures available with Peltier coolers.
{"title":"Far and Mid IR Stimulated Emission in HgCdTe QW Heterostructures","authors":"V. Gavrilenko, S. Morozov, V. Rumyantsev, M. Fadeev, V. Utochkin, N. Kulikov, A. A. Dubinov, V. Aleshkin, N. Mikhailov, S. Dvoretskii, F. Teppe, C. Sirtori","doi":"10.1109/IRMMW-THz.2019.8874550","DOIUrl":"https://doi.org/10.1109/IRMMW-THz.2019.8874550","url":null,"abstract":"Stimulated emission (SE) at wavelengths up to 24 μm (12.5 THz) and down to 2.8 μm is demonstrated from HgCdTe quantum well (QW) heterostructures. Non-radiative Auger recombination is show to be mitigated due to relativistic energy spectrum. Pump-probe carrier lifetime measurements show that further increase in SE wavelength is feasible up to 60 μm (5 THz). In the short wavelength range SE down to 2.8 μm is demonstrated at temperatures available with Peltier coolers.","PeriodicalId":6686,"journal":{"name":"2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"7 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86252168","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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