Pub Date : 2015-11-12DOI: 10.1109/IRMMW-THZ.2015.7327943
S. Mitsudo, C. Umegaki, Y. Fujii, Y. Tatematsu
In order to realize pulsed ESR measurements by using a gyrotron oscillator. 154 GHz gyrotron output had been successfully sliced to intense and short millimeter wave pulses. A quasi-optical transmission system has been developed to be led these short pulses to ESR measurement probe.
{"title":"Quasi-optical transmission system for a pulsed ESR system by using a gyrotron as a light source","authors":"S. Mitsudo, C. Umegaki, Y. Fujii, Y. Tatematsu","doi":"10.1109/IRMMW-THZ.2015.7327943","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2015.7327943","url":null,"abstract":"In order to realize pulsed ESR measurements by using a gyrotron oscillator. 154 GHz gyrotron output had been successfully sliced to intense and short millimeter wave pulses. A quasi-optical transmission system has been developed to be led these short pulses to ESR measurement probe.","PeriodicalId":6577,"journal":{"name":"2015 40th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz)","volume":"36 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2015-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86816552","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 : 2015-11-12DOI: 10.1109/IRMMW-THZ.2015.7327680
Y. Kajihara, T. Yokoyama, Kuan-ting Lin, Sunmi Kim
Our passive near-field microscope probes thermal evanescent waves due to local phenomena on material's surface. With the microscope, we study dielectric samples since they have surface phonon resonances whose resonance wavelengths are very close to our detection wavelength. From the results, GaAs, SiC, and AlN show reasonable signals due to thermal fluctuations, whereas GaN show very unique characteristics. In this report, we show and discuss the results.
{"title":"Probing thermal evanescent waves on dielectric surfaces","authors":"Y. Kajihara, T. Yokoyama, Kuan-ting Lin, Sunmi Kim","doi":"10.1109/IRMMW-THZ.2015.7327680","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2015.7327680","url":null,"abstract":"Our passive near-field microscope probes thermal evanescent waves due to local phenomena on material's surface. With the microscope, we study dielectric samples since they have surface phonon resonances whose resonance wavelengths are very close to our detection wavelength. From the results, GaAs, SiC, and AlN show reasonable signals due to thermal fluctuations, whereas GaN show very unique characteristics. In this report, we show and discuss the results.","PeriodicalId":6577,"journal":{"name":"2015 40th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz)","volume":"56 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2015-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88302797","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 : 2015-11-12DOI: 10.1109/IRMMW-THZ.2015.7327916
T. Kurabayashi, K. Konishi, S. Yodokawa, S. Kosaka
We attempted to analyze a solution of biological matter of sugars, amino-acids, and electrolytes using a millimeter-wave reflection spectroscopy. The sensitivity for the concentration of solutes was improved markedly, when an adequate dielectric layer was inserted at the interface of incident side of the solution as impedance matched layer. The sensitivity was covered fully in the range of adequate blood sugar level of human as 0.07-0.16 g/100ml H2O in the case of glucose solution.
{"title":"Reflection spectroscopy on solutions of biological materials in millimeter wave frequency","authors":"T. Kurabayashi, K. Konishi, S. Yodokawa, S. Kosaka","doi":"10.1109/IRMMW-THZ.2015.7327916","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2015.7327916","url":null,"abstract":"We attempted to analyze a solution of biological matter of sugars, amino-acids, and electrolytes using a millimeter-wave reflection spectroscopy. The sensitivity for the concentration of solutes was improved markedly, when an adequate dielectric layer was inserted at the interface of incident side of the solution as impedance matched layer. The sensitivity was covered fully in the range of adequate blood sugar level of human as 0.07-0.16 g/100ml H2O in the case of glucose solution.","PeriodicalId":6577,"journal":{"name":"2015 40th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz)","volume":"8 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2015-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89069800","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 : 2015-11-12DOI: 10.1109/IRMMW-THZ.2015.7327537
Ryo Yamzaki, Mikiya Kato, K. Murate, Kazuki Imayama, K. Kawase
The injection-seeded terahertz parametric generator (is-TPG) is suitable for the non-destructive inspection of illicit drugs and explosives concealed in mail because of its high power generation and sensitive detectors. This study examined a terahertz (THz) spectrometry method suitable for the non-destructive detection of chemicals concealed in mail envelopes. We compared the transmission spectra of three saccharides in different covering materials using is-TPG and terahertz time-domain spectroscopy (THz-TDS).
{"title":"Non-destructive inspection of chemicals in mail envelopes using an injection-seeded terahertz-wave parametric generator","authors":"Ryo Yamzaki, Mikiya Kato, K. Murate, Kazuki Imayama, K. Kawase","doi":"10.1109/IRMMW-THZ.2015.7327537","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2015.7327537","url":null,"abstract":"The injection-seeded terahertz parametric generator (is-TPG) is suitable for the non-destructive inspection of illicit drugs and explosives concealed in mail because of its high power generation and sensitive detectors. This study examined a terahertz (THz) spectrometry method suitable for the non-destructive detection of chemicals concealed in mail envelopes. We compared the transmission spectra of three saccharides in different covering materials using is-TPG and terahertz time-domain spectroscopy (THz-TDS).","PeriodicalId":6577,"journal":{"name":"2015 40th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz)","volume":"1 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2015-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76182986","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 : 2015-11-12DOI: 10.1109/IRMMW-THZ.2015.7327834
D. Klugmann, H. Wang, S. Rea, B. Moyna, M. Oldfield, P. Huggard, B. Ellison
Millimetre wave radar has been successfully applied in cloud research for a number of decades. The Rutherford Appleton Laboratory (RAL) has developed a 94 GHz radar based on solid state components and operated in Frequency Modulated Continuous Wave (FMCW) mode. The approach for improving the RF design - including the implementation of Doppler capability - and the results of this activity will be presented.
{"title":"A solid state W-band radar profiler for cloud observation","authors":"D. Klugmann, H. Wang, S. Rea, B. Moyna, M. Oldfield, P. Huggard, B. Ellison","doi":"10.1109/IRMMW-THZ.2015.7327834","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2015.7327834","url":null,"abstract":"Millimetre wave radar has been successfully applied in cloud research for a number of decades. The Rutherford Appleton Laboratory (RAL) has developed a 94 GHz radar based on solid state components and operated in Frequency Modulated Continuous Wave (FMCW) mode. The approach for improving the RF design - including the implementation of Doppler capability - and the results of this activity will be presented.","PeriodicalId":6577,"journal":{"name":"2015 40th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz)","volume":"181 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2015-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77477493","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 : 2015-11-12DOI: 10.1109/IRMMW-THZ.2015.7327656
Wenze Yuan, Xiaohai Cui, Yong Li, Chao Ma
Thermistor mounts are served as transfer standards which are calibrated in microcalorimeter. A correlation between the effective efficiency of thermistor mount and the relative humidity of the laboratory has been observed. The difference of effective efficiency measurement in 20% and 50% humidity level can be about 9 times the k=1 uncertainty. The effects of humidity on thermistor mounts can result in the changes of effective efficiency. While the humidity impacts on other microwave device in microcalorimeter is not the main reason of these changes.
{"title":"Effects of relative humidity on thermistor mount measurements","authors":"Wenze Yuan, Xiaohai Cui, Yong Li, Chao Ma","doi":"10.1109/IRMMW-THZ.2015.7327656","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2015.7327656","url":null,"abstract":"Thermistor mounts are served as transfer standards which are calibrated in microcalorimeter. A correlation between the effective efficiency of thermistor mount and the relative humidity of the laboratory has been observed. The difference of effective efficiency measurement in 20% and 50% humidity level can be about 9 times the k=1 uncertainty. The effects of humidity on thermistor mounts can result in the changes of effective efficiency. While the humidity impacts on other microwave device in microcalorimeter is not the main reason of these changes.","PeriodicalId":6577,"journal":{"name":"2015 40th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz)","volume":"6 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2015-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79571850","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 : 2015-11-12DOI: 10.1109/IRMMW-THZ.2015.7327870
A. Vodopyanov, M. Glyavin, A. Luchinin, S. Razin, A. Sidorov, A. Fokin
We present the first results of studying a pulsed (20 μs) discharge in nitrogen, which is produced by high-power (40 kW) focused beam of terahertz (0.67 THz) waves. The time dynamics of the discharge plasma glowing is studied in a wide range of wavelengths (300-650 nm) and gas pressures (0.5-350 Torr). An assumption is made about the determining role of long-living metastables of nitrogen N2 (A3Σu+) in the observed dynamics of the discharge afterglow.
{"title":"Plasma glow dynamics of pulsed nitrogen discharge induced by the powerful terahertz waves","authors":"A. Vodopyanov, M. Glyavin, A. Luchinin, S. Razin, A. Sidorov, A. Fokin","doi":"10.1109/IRMMW-THZ.2015.7327870","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2015.7327870","url":null,"abstract":"We present the first results of studying a pulsed (20 μs) discharge in nitrogen, which is produced by high-power (40 kW) focused beam of terahertz (0.67 THz) waves. The time dynamics of the discharge plasma glowing is studied in a wide range of wavelengths (300-650 nm) and gas pressures (0.5-350 Torr). An assumption is made about the determining role of long-living metastables of nitrogen N<sub>2</sub> (A<sup>3</sup>Σ<sub>u</sub><sup>+</sup>) in the observed dynamics of the discharge afterglow.","PeriodicalId":6577,"journal":{"name":"2015 40th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz)","volume":"82 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2015-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77659261","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 : 2015-11-12DOI: 10.1109/IRMMW-THZ.2015.7327802
Jin Xu, H. Yin, Zhigang Lu, Lingna Yue, H. Gong, Y. Gong, Yanyu Wei, Wenxiang Wang
The wakefield effects driven by a relativistic electron bunch train in dielectric PBG structure are presented here. The energy of electron beam can be modulated by self-wake or laser modulation. The excited narrow-band THz wakefield is confined in the defect of 2-D dielectric structure when bunches travel through the PBG structure. And the other spectrum signals are freely radiated through the PBG structure.
{"title":"THz wakefield in dielectric PBG structure driven by electron bunches","authors":"Jin Xu, H. Yin, Zhigang Lu, Lingna Yue, H. Gong, Y. Gong, Yanyu Wei, Wenxiang Wang","doi":"10.1109/IRMMW-THZ.2015.7327802","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2015.7327802","url":null,"abstract":"The wakefield effects driven by a relativistic electron bunch train in dielectric PBG structure are presented here. The energy of electron beam can be modulated by self-wake or laser modulation. The excited narrow-band THz wakefield is confined in the defect of 2-D dielectric structure when bunches travel through the PBG structure. And the other spectrum signals are freely radiated through the PBG structure.","PeriodicalId":6577,"journal":{"name":"2015 40th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz)","volume":"87 8","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2015-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91417626","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 : 2015-11-12DOI: 10.1109/IRMMW-THZ.2015.7327770
A. Arzhannikov, I. Timofeev, V. Annenkov
We study the linear mode conversion between upper-hybrid and electromagnetic waves as a possible mechanism of sub-Thz emissions produced in laboratory magnetized plasmas penetrated by relativistic electron beams.
{"title":"Linear conversion of upper-hybrid to electromagnetic waves as a mechanism of sub-THz emission in laboratory REB-plasma experiments","authors":"A. Arzhannikov, I. Timofeev, V. Annenkov","doi":"10.1109/IRMMW-THZ.2015.7327770","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2015.7327770","url":null,"abstract":"We study the linear mode conversion between upper-hybrid and electromagnetic waves as a possible mechanism of sub-Thz emissions produced in laboratory magnetized plasmas penetrated by relativistic electron beams.","PeriodicalId":6577,"journal":{"name":"2015 40th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz)","volume":"73 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2015-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87081846","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 : 2015-11-12DOI: 10.1109/IRMMW-THZ.2015.7327553
V. Torgashev, B. Gorshunov, E. Zhukova, M. Savinov, C. Kadlec, F. Kadlec, V. Skoromets, J. Prokleška, V. Thomas, D. Fursenko, E. V. Pestrjakov, V. Uskov, G. S. Shakurov, R. Kremer, L. Kadyrov, M. Belyanchikov, A. S. Prokhorov, V. Gorelik, M. Dressel
Broadband (1 Hz to 100 THz) dielectric response of water-containing beryl crystals was measured at temperatures from 300 K down to 0.3 K. The low-energy dynamics of H2O molecules confined within nano-cages of the crystalline lattice was studied. We observe a THz-range soft mode indicating an incipient ferroelectric behavior due to interacting dipole moments of confined water molecules.
{"title":"Broadband spectroscopy of H2O molecule confined in nano-cages of crystal lattice: Low-energy dynamics and incipient ferroelectric behavior","authors":"V. Torgashev, B. Gorshunov, E. Zhukova, M. Savinov, C. Kadlec, F. Kadlec, V. Skoromets, J. Prokleška, V. Thomas, D. Fursenko, E. V. Pestrjakov, V. Uskov, G. S. Shakurov, R. Kremer, L. Kadyrov, M. Belyanchikov, A. S. Prokhorov, V. Gorelik, M. Dressel","doi":"10.1109/IRMMW-THZ.2015.7327553","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2015.7327553","url":null,"abstract":"Broadband (1 Hz to 100 THz) dielectric response of water-containing beryl crystals was measured at temperatures from 300 K down to 0.3 K. The low-energy dynamics of H2O molecules confined within nano-cages of the crystalline lattice was studied. We observe a THz-range soft mode indicating an incipient ferroelectric behavior due to interacting dipole moments of confined water molecules.","PeriodicalId":6577,"journal":{"name":"2015 40th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz)","volume":"1 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2015-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87151366","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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