Pub Date : 2002-12-16DOI: 10.1109/ICIMW.2002.1076161
Guofen Yu, Shengguang Liu, Wenxiang Wang
Experimental results of the influence of low intensity millimeter waves on the growth rate of E. coli and the transformation of plasmid DNA to bacteria are given. The possibility of nonthermal effects of millimeter waves is discussed. Suggestions for verifying whether an effect is a nonthermal effect are given.
{"title":"Do nonthermal biological effects of millimeter waves exist?","authors":"Guofen Yu, Shengguang Liu, Wenxiang Wang","doi":"10.1109/ICIMW.2002.1076161","DOIUrl":"https://doi.org/10.1109/ICIMW.2002.1076161","url":null,"abstract":"Experimental results of the influence of low intensity millimeter waves on the growth rate of E. coli and the transformation of plasmid DNA to bacteria are given. The possibility of nonthermal effects of millimeter waves is discussed. Suggestions for verifying whether an effect is a nonthermal effect are given.","PeriodicalId":23431,"journal":{"name":"Twenty Seventh International Conference on Infrared and Millimeter Waves","volume":"50 1","pages":"215-216"},"PeriodicalIF":0.0,"publicationDate":"2002-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86600883","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 : 2002-12-16DOI: 10.1109/ICIMW.2002.1076091
E. Vasconcellos, M. Jackson, M. Lauters, H. Hockel, M. D. Allen, K. Evenson
/sup 12/CD/sub 3/OH and /sup 13/CD/sub 3/OH have produced hundreds of far-infrared laser lines in the 22 to 3030 /spl mu/m wavelength region when optically pumped by CO/sub 2/ lasers. In this work, we report the discovery and frequency measurement of optically pumped laser emissions from these molecules in the wavelength range from 45.3 to 103.3 /spl mu/m.
{"title":"Discovery of new optically pumped far infrared laser emissions in /sup 12/CD/sub 3/OH and /sup 13/CD/sub 3/OH","authors":"E. Vasconcellos, M. Jackson, M. Lauters, H. Hockel, M. D. Allen, K. Evenson","doi":"10.1109/ICIMW.2002.1076091","DOIUrl":"https://doi.org/10.1109/ICIMW.2002.1076091","url":null,"abstract":"/sup 12/CD/sub 3/OH and /sup 13/CD/sub 3/OH have produced hundreds of far-infrared laser lines in the 22 to 3030 /spl mu/m wavelength region when optically pumped by CO/sub 2/ lasers. In this work, we report the discovery and frequency measurement of optically pumped laser emissions from these molecules in the wavelength range from 45.3 to 103.3 /spl mu/m.","PeriodicalId":23431,"journal":{"name":"Twenty Seventh International Conference on Infrared and Millimeter Waves","volume":"1 1","pages":"75-76"},"PeriodicalIF":0.0,"publicationDate":"2002-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76188715","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 : 2002-12-16DOI: 10.1109/ICIMW.2002.1076180
F. Klappenberger, K. Renk, E. Schomburg, R. Summer, S. Ganichev, W. Prettl
We present a fast detector for THz radiation. The detector consists of a current carrying n doped GaAs crystal built in a corner cube antenna system. Irradiation with THz radiation leads to a reduction of the direct current. We demonstrate the feasibility for detection by analysing single radiation pulses of a TEA CO/sub 2/ laser pumped FIR gas laser.
{"title":"Fast GaAs detector for THz radiation","authors":"F. Klappenberger, K. Renk, E. Schomburg, R. Summer, S. Ganichev, W. Prettl","doi":"10.1109/ICIMW.2002.1076180","DOIUrl":"https://doi.org/10.1109/ICIMW.2002.1076180","url":null,"abstract":"We present a fast detector for THz radiation. The detector consists of a current carrying n doped GaAs crystal built in a corner cube antenna system. Irradiation with THz radiation leads to a reduction of the direct current. We demonstrate the feasibility for detection by analysing single radiation pulses of a TEA CO/sub 2/ laser pumped FIR gas laser.","PeriodicalId":23431,"journal":{"name":"Twenty Seventh International Conference on Infrared and Millimeter Waves","volume":"10 1","pages":"253-254"},"PeriodicalIF":0.0,"publicationDate":"2002-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88474197","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 : 2002-12-16DOI: 10.1109/ICIMW.2002.1076192
Zhiyuan Yu, Weigan Lin
A numerical analysis is presented by the finite difference time domain method in this paper. A microstrip with an asymmetric metal bandgap structure which shows an extra-wide stop band is numerically analysed when its package is changed.
{"title":"A numerical analysis of the effects of the packing of microstrip devices with photonic bandgap technique","authors":"Zhiyuan Yu, Weigan Lin","doi":"10.1109/ICIMW.2002.1076192","DOIUrl":"https://doi.org/10.1109/ICIMW.2002.1076192","url":null,"abstract":"A numerical analysis is presented by the finite difference time domain method in this paper. A microstrip with an asymmetric metal bandgap structure which shows an extra-wide stop band is numerically analysed when its package is changed.","PeriodicalId":23431,"journal":{"name":"Twenty Seventh International Conference on Infrared and Millimeter Waves","volume":"20 1","pages":"277-278"},"PeriodicalIF":0.0,"publicationDate":"2002-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88518088","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 : 2002-12-16DOI: 10.1109/ICIMW.2002.1076214
S. Ganichev, W. Prettl
It is shown that a homogeneous spin-polarized electron gas in semiconductor heterostructures can drive an electric current. Here we report on this spin-galvanic effect where the spin polarization has been achieved by optical orientation applying circularly polarized far-infrared laser radiation. The microscopic origin-of the effect is an inherent asymmetry of spin-flip scattering.
{"title":"Infrared spin orientation and spin-galvanic effect in semiconductor heterostructures","authors":"S. Ganichev, W. Prettl","doi":"10.1109/ICIMW.2002.1076214","DOIUrl":"https://doi.org/10.1109/ICIMW.2002.1076214","url":null,"abstract":"It is shown that a homogeneous spin-polarized electron gas in semiconductor heterostructures can drive an electric current. Here we report on this spin-galvanic effect where the spin polarization has been achieved by optical orientation applying circularly polarized far-infrared laser radiation. The microscopic origin-of the effect is an inherent asymmetry of spin-flip scattering.","PeriodicalId":23431,"journal":{"name":"Twenty Seventh International Conference on Infrared and Millimeter Waves","volume":"1 1","pages":"321-322"},"PeriodicalIF":0.0,"publicationDate":"2002-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91347158","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 : 2002-12-16DOI: 10.1109/ICIMW.2002.1076139
S. Hansel, A. Kirste, H. Mueller, M. von Ortenberg, E. Huseynov
We report on magnetotransmission measurements of 10.6 μm radiation through bulk InSb in transient megagauss field pulses. The half period of about 6 μs of the oscillating field is comparable to the characteristic relaxation time in the material. Field reversal between the oscillations demonstrates the strong influence of the "history" of the state population within the relaxation time.
{"title":"Infrared detection of carrier dynamics in indium antimonide in megagauss fields","authors":"S. Hansel, A. Kirste, H. Mueller, M. von Ortenberg, E. Huseynov","doi":"10.1109/ICIMW.2002.1076139","DOIUrl":"https://doi.org/10.1109/ICIMW.2002.1076139","url":null,"abstract":"We report on magnetotransmission measurements of 10.6 μm radiation through bulk InSb in transient megagauss field pulses. The half period of about 6 μs of the oscillating field is comparable to the characteristic relaxation time in the material. Field reversal between the oscillations demonstrates the strong influence of the \"history\" of the state population within the relaxation time.","PeriodicalId":23431,"journal":{"name":"Twenty Seventh International Conference on Infrared and Millimeter Waves","volume":"10 1","pages":"171-172"},"PeriodicalIF":0.0,"publicationDate":"2002-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73361543","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 : 2002-12-16DOI: 10.1109/ICIMW.2002.1076075
M. Airila
The two-dimensional self-consistent time-dependent theory of beam-wave interaction in gyrotron resonators has been modified to account for eccentricity of the annular hollow electron beam. Numerical analysis yields the effect of beam eccentricity on the previously known limiting values of the azimuthal index of the mode, beyond which stationary single-mode operation becomes impossible.
{"title":"Spatio-temporal chaos in a gyrotron resonator with an off-axis electron beam","authors":"M. Airila","doi":"10.1109/ICIMW.2002.1076075","DOIUrl":"https://doi.org/10.1109/ICIMW.2002.1076075","url":null,"abstract":"The two-dimensional self-consistent time-dependent theory of beam-wave interaction in gyrotron resonators has been modified to account for eccentricity of the annular hollow electron beam. Numerical analysis yields the effect of beam eccentricity on the previously known limiting values of the azimuthal index of the mode, beyond which stationary single-mode operation becomes impossible.","PeriodicalId":23431,"journal":{"name":"Twenty Seventh International Conference on Infrared and Millimeter Waves","volume":"31 2 1","pages":"43-44"},"PeriodicalIF":0.0,"publicationDate":"2002-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78087330","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 : 2002-12-16DOI: 10.1109/ICIMW.2002.1076179
A. Kozyrev
A method of direct transformation of a video pulse into a radio pulse in a microstrip transmission line (TL) filled with a nonlinear medium on the basis of a multilayer heterostructure (MLHS) with asymmetric barriers (AlAs/n-GaAs/Al/sub x/Ga/sub 1-x/As/n/sup +/GaAs/AlAs)/sub N/ has been suggested by A.M. Belyantsev and A.B. Kozyrev (Int. J. Inf. and MM Waves, vol. 18, p. 1169, 1997). The mechanism for the transformation is the electromagnetic shock-wave (EMSW) front instability towards the forward wave running in synchronism with it. In this paper, we study the special features of the direct transformation of a video pulse into a radio pulse in a bi-modal electrodynamic system of the coupled TL type with different types of dispersion allowing backward wave propagation.
{"title":"Generation of high-frequency radiation in bi-modal electrodynamic system filled by asymmetric multilayer heterostructure","authors":"A. Kozyrev","doi":"10.1109/ICIMW.2002.1076179","DOIUrl":"https://doi.org/10.1109/ICIMW.2002.1076179","url":null,"abstract":"A method of direct transformation of a video pulse into a radio pulse in a microstrip transmission line (TL) filled with a nonlinear medium on the basis of a multilayer heterostructure (MLHS) with asymmetric barriers (AlAs/n-GaAs/Al/sub x/Ga/sub 1-x/As/n/sup +/GaAs/AlAs)/sub N/ has been suggested by A.M. Belyantsev and A.B. Kozyrev (Int. J. Inf. and MM Waves, vol. 18, p. 1169, 1997). The mechanism for the transformation is the electromagnetic shock-wave (EMSW) front instability towards the forward wave running in synchronism with it. In this paper, we study the special features of the direct transformation of a video pulse into a radio pulse in a bi-modal electrodynamic system of the coupled TL type with different types of dispersion allowing backward wave propagation.","PeriodicalId":23431,"journal":{"name":"Twenty Seventh International Conference on Infrared and Millimeter Waves","volume":"64 1","pages":"251-252"},"PeriodicalIF":0.0,"publicationDate":"2002-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81028163","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 : 2002-12-16DOI: 10.1109/ICIMW.2002.1076147
J. Jin, Shi-Chang Zhang, C. Qiu, Xiaoping Liang
In this paper a gyrotron with tapered guide magnetic field is proposed. The transmission quality of the electron beam in this device is investigated and found to be improved. Simulations show the electronic efficiency of the FZK gyrotron experiment might be increased up to 38.7% by tapering the guide magnetic field.
{"title":"Proposal of a coaxial-cavity gyrotron with tapered guide magnetic field","authors":"J. Jin, Shi-Chang Zhang, C. Qiu, Xiaoping Liang","doi":"10.1109/ICIMW.2002.1076147","DOIUrl":"https://doi.org/10.1109/ICIMW.2002.1076147","url":null,"abstract":"In this paper a gyrotron with tapered guide magnetic field is proposed. The transmission quality of the electron beam in this device is investigated and found to be improved. Simulations show the electronic efficiency of the FZK gyrotron experiment might be increased up to 38.7% by tapering the guide magnetic field.","PeriodicalId":23431,"journal":{"name":"Twenty Seventh International Conference on Infrared and Millimeter Waves","volume":"18 1","pages":"187-188"},"PeriodicalIF":0.0,"publicationDate":"2002-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81102921","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 : 2002-12-16DOI: 10.1109/ICIMW.2002.1076129
H. Idei, T. Shimozuma, T. Notake, S. Ito, S. Kubo, M. Shapiro, J. Anderson, R. Temkin, K. Ohkubo
In the 84 GHz CPI gyrotron, with a single-stage depressed collector in the TE/sub 15,3/ oscillating mode, a geometric optics Vlasov converter was installed in the tube to convert the mode into a Gaussian beam. The low power test stand where intensity and phase patterns can be measured was prepared at the National Institute for Fusion Science (NIFS). The sizes and tilt angles of quasi-optical beams are deduced from the measured intensity and phase profiles using the moment method. The Gaussian-like beam is coupled into the HE/sub 11/ corrugated waveguide with tilt angle adjustment. The beam radiated from the waveguide after coupling is analyzed with the moment method. The Gaussian content in the radiated beam is also discussed.
{"title":"Beam alignment of ECH transmission line using moment method","authors":"H. Idei, T. Shimozuma, T. Notake, S. Ito, S. Kubo, M. Shapiro, J. Anderson, R. Temkin, K. Ohkubo","doi":"10.1109/ICIMW.2002.1076129","DOIUrl":"https://doi.org/10.1109/ICIMW.2002.1076129","url":null,"abstract":"In the 84 GHz CPI gyrotron, with a single-stage depressed collector in the TE/sub 15,3/ oscillating mode, a geometric optics Vlasov converter was installed in the tube to convert the mode into a Gaussian beam. The low power test stand where intensity and phase patterns can be measured was prepared at the National Institute for Fusion Science (NIFS). The sizes and tilt angles of quasi-optical beams are deduced from the measured intensity and phase profiles using the moment method. The Gaussian-like beam is coupled into the HE/sub 11/ corrugated waveguide with tilt angle adjustment. The beam radiated from the waveguide after coupling is analyzed with the moment method. The Gaussian content in the radiated beam is also discussed.","PeriodicalId":23431,"journal":{"name":"Twenty Seventh International Conference on Infrared and Millimeter Waves","volume":"10 1","pages":"151-152"},"PeriodicalIF":0.0,"publicationDate":"2002-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88826294","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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