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Infrared and Millimeter Waves, Conference Digest of the 2004 Joint 29th International Conference on 2004 and 12th International Conference on Terahertz Electronics, 2004.最新文献

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A table-top Cerenkov FEL at 50 GHz 50 GHz的台式切伦科夫自由电子激光器
Infrared and Millimeter Waves, Conference Digest of the 2004 Joint 29th International Conference on 2004 and 12th International Conference on Terahertz Electronics, 2004. Pub Date : 2004-09-27 DOI: 10.1109/ICIMW.2004.1422234
I. de la Fuente, P. V. D. van der Slot, K. Boller
{"title":"A table-top Cerenkov FEL at 50 GHz","authors":"I. de la Fuente, P. V. D. van der Slot, K. Boller","doi":"10.1109/ICIMW.2004.1422234","DOIUrl":"https://doi.org/10.1109/ICIMW.2004.1422234","url":null,"abstract":"As part of the EC-funded MicroPro project, a table-top Cerenkov FEL is being realized that ultimately should generate 1 kW CW output power around 50 GHz. Design aspects and first experimental results are presented. The source is used for a number of applications.","PeriodicalId":13627,"journal":{"name":"Infrared and Millimeter Waves, Conference Digest of the 2004 Joint 29th International Conference on 2004 and 12th International Conference on Terahertz Electronics, 2004.","volume":"7 1","pages":"601-602"},"PeriodicalIF":0.0,"publicationDate":"2004-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88905554","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}
引用次数: 0
Optical two-photon absorption in GaAs measured by optical pump-terahertz probe spectroscopy 光泵浦-太赫兹探针光谱法测量砷化镓的光双光子吸收
Infrared and Millimeter Waves, Conference Digest of the 2004 Joint 29th International Conference on 2004 and 12th International Conference on Terahertz Electronics, 2004. Pub Date : 2004-09-14 DOI: 10.1103/PHYSREVB.70.125205
F. Kadlec, H. Němec, P. Kužel
{"title":"Optical two-photon absorption in GaAs measured by optical pump-terahertz probe spectroscopy","authors":"F. Kadlec, H. Němec, P. Kužel","doi":"10.1103/PHYSREVB.70.125205","DOIUrl":"https://doi.org/10.1103/PHYSREVB.70.125205","url":null,"abstract":"A novel scheme of optical pump-THz probe experiments was used to study the nonlinear absorption in GaAs. The crystal was excited by ultrashort laser pulses with wavelength 810 nm and fluences up to 4.2 mJ/cm/sup 2/, for which the single-photon absorption (SPA) saturates and the two-photon absorption (TPA) dominates. The TPA coefficient /spl beta/ and its anisotropy were determined.","PeriodicalId":13627,"journal":{"name":"Infrared and Millimeter Waves, Conference Digest of the 2004 Joint 29th International Conference on 2004 and 12th International Conference on Terahertz Electronics, 2004.","volume":"3 1","pages":"497-498"},"PeriodicalIF":0.0,"publicationDate":"2004-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79775657","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}
引用次数: 44
Passive millimeter-wave focal plane array 无源毫米波焦平面阵列
Infrared and Millimeter Waves, Conference Digest of the 2004 Joint 29th International Conference on 2004 and 12th International Conference on Terahertz Electronics, 2004. Pub Date : 2004-08-12 DOI: 10.1117/12.542753
C. Middleton, G. Zummo, A. Weeks, A. Pergande, L. Mirth, G. Boreman
{"title":"Passive millimeter-wave focal plane array","authors":"C. Middleton, G. Zummo, A. Weeks, A. Pergande, L. Mirth, G. Boreman","doi":"10.1117/12.542753","DOIUrl":"https://doi.org/10.1117/12.542753","url":null,"abstract":"We built and tested a low-cost 8-by-8 millimeter-wave focal plane array using antenna-coupled micro-bolometers. The array consists of slot antennas coupled to nickel bolometers and was fabricated using optical lithography on high-resistivity silicon wafers. The measured noise equivalent temperature difference (NETD) of an individual element was 450 K. Simulation results corresponded with observed device performance. An improved design was then implemented using a square spiral antenna. We discuss the fabrication of this type of array element, including some modeling results, and present the methods and results of our measurements.","PeriodicalId":13627,"journal":{"name":"Infrared and Millimeter Waves, Conference Digest of the 2004 Joint 29th International Conference on 2004 and 12th International Conference on Terahertz Electronics, 2004.","volume":"1 1","pages":"745-746"},"PeriodicalIF":0.0,"publicationDate":"2004-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81103936","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}
引用次数: 12
Excitation and propagation of surface plasmon polaritons on metallic periodic structures 金属周期结构表面等离子激元激元的激发与传播
Infrared and Millimeter Waves, Conference Digest of the 2004 Joint 29th International Conference on 2004 and 12th International Conference on Terahertz Electronics, 2004. Pub Date : 2004-07-25 DOI: 10.1109/ICIMW.2004.1422108
G. Torosyan, C. Rau, B. Pradarutti, R. Beigang
{"title":"Excitation and propagation of surface plasmon polaritons on metallic periodic structures","authors":"G. Torosyan, C. Rau, B. Pradarutti, R. Beigang","doi":"10.1109/ICIMW.2004.1422108","DOIUrl":"https://doi.org/10.1109/ICIMW.2004.1422108","url":null,"abstract":"Surface plasmon polaritons are excited in periodic metallic structures using fs THz pulses. The transmission and emission properties from a periodic structure of metallic rods with different diameters clearly show the influence of Wood's anomalies. The velocity of propagation of the surface plasmon polaritons is determined experimentally.","PeriodicalId":13627,"journal":{"name":"Infrared and Millimeter Waves, Conference Digest of the 2004 Joint 29th International Conference on 2004 and 12th International Conference on Terahertz Electronics, 2004.","volume":"144 1","pages":"361-362"},"PeriodicalIF":0.0,"publicationDate":"2004-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77944180","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}
引用次数: 2
Progress in the new ECRH system for ASDEX Upgrade ASDEX升级新ECRH系统的进展
Infrared and Millimeter Waves, Conference Digest of the 2004 Joint 29th International Conference on 2004 and 12th International Conference on Terahertz Electronics, 2004. Pub Date : 2004-07-01 DOI: 10.1109/PLASMA.2004.1340112
F. Leuterer, G. Grunwald, F. Monaco, M. Munich, F. Ryter, H. Schutz, D. Wagner, H. Zohm, T. Franke, G. Dammertz, H. Heidinger, K. Koppenburg, M. Thumm, W. Kasparek, G. Gantenbein, G. Denisov, A. Litvak, V. Zapevalov
{"title":"Progress in the new ECRH system for ASDEX Upgrade","authors":"F. Leuterer, G. Grunwald, F. Monaco, M. Munich, F. Ryter, H. Schutz, D. Wagner, H. Zohm, T. Franke, G. Dammertz, H. Heidinger, K. Koppenburg, M. Thumm, W. Kasparek, G. Gantenbein, G. Denisov, A. Litvak, V. Zapevalov","doi":"10.1109/PLASMA.2004.1340112","DOIUrl":"https://doi.org/10.1109/PLASMA.2004.1340112","url":null,"abstract":"A multi-frequency ECRH system with 4 gyrotrons, tunable in the range of 105-140 GHz, is currently under construction at ASDEX Upgrade with a total power of 4 MW and a pulse length of 10 s. A fast steerable launcher for feedback controlled deposition has been installed that allows for poloidal steering of 10/spl deg/ within 100 ms. Transmission line elements, such as corrugated waveguides, polarizer mirrors and vacuum windows, are designed to cope for this frequency band.","PeriodicalId":13627,"journal":{"name":"Infrared and Millimeter Waves, Conference Digest of the 2004 Joint 29th International Conference on 2004 and 12th International Conference on Terahertz Electronics, 2004.","volume":"39 1","pages":"219-220"},"PeriodicalIF":0.0,"publicationDate":"2004-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78987952","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}
引用次数: 0
Terahertz probes of transient conducting and insulating phases in quasi-2D electron-hole gases 准二维电子空穴气体中瞬态导电和绝缘相的太赫兹探针
Infrared and Millimeter Waves, Conference Digest of the 2004 Joint 29th International Conference on 2004 and 12th International Conference on Terahertz Electronics, 2004. Pub Date : 2004-07-01 DOI: 10.1109/ICIMW.2004.1422184
R. Kaindl, D. Hägele, M. Carnahan, R. Lovenich, D. Chemla
{"title":"Terahertz probes of transient conducting and insulating phases in quasi-2D electron-hole gases","authors":"R. Kaindl, D. Hägele, M. Carnahan, R. Lovenich, D. Chemla","doi":"10.1109/ICIMW.2004.1422184","DOIUrl":"https://doi.org/10.1109/ICIMW.2004.1422184","url":null,"abstract":"We employ ultrafast terahertz (THz) pulses to study the dynamical interplay of optically-induced excitons and unbound electron-hole pairs in GaAs/AlGaAs quantum wells. A distinct low-energy oscillator appears upon resonant excitation of heavy-hole excitons, linked to transitions between their internal degrees of freedom. Time-resolving changes in the THz conductivity, we can observe dynamical transitions between conducting and insulating phases as excitons form or ionize on ultrashort timescales.","PeriodicalId":13627,"journal":{"name":"Infrared and Millimeter Waves, Conference Digest of the 2004 Joint 29th International Conference on 2004 and 12th International Conference on Terahertz Electronics, 2004.","volume":"17 1","pages":"503-504"},"PeriodicalIF":0.0,"publicationDate":"2004-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90200718","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}
引用次数: 1
Effects of external reflections on gyrotron backward wave oscillators 外反射对回旋管后向波振荡器的影响
Infrared and Millimeter Waves, Conference Digest of the 2004 Joint 29th International Conference on 2004 and 12th International Conference on Terahertz Electronics, 2004. Pub Date : 2004-07-01 DOI: 10.1109/ICIMW.2004.1422252
S. Chen, C. Chiu, T. Chang, K. Pao, K. Chu
{"title":"Effects of external reflections on gyrotron backward wave oscillators","authors":"S. Chen, C. Chiu, T. Chang, K. Pao, K. Chu","doi":"10.1109/ICIMW.2004.1422252","DOIUrl":"https://doi.org/10.1109/ICIMW.2004.1422252","url":null,"abstract":"The gyrotron backward-wave oscillator (gyro-BWO) is sensitive to external reflections because it employs a non-resonant interaction structure. These reflections may result in serious output power variations and ragged frequency tuning. A numerical model is developed for the investigation of the reflection effects. It treats beam-wave interactions in the presence of external reflections. As a hybrid feature of the formalism, external reflections are self-consistently determined by the structures, rather than artificially set as a constant value as in previous models. The model has been employed to examine the effects of external reflections on the tunable bandwidth of the gyro-BWO, and showed the resonance in the external circuit is the major cause of the ragged frequency tuning.","PeriodicalId":13627,"journal":{"name":"Infrared and Millimeter Waves, Conference Digest of the 2004 Joint 29th International Conference on 2004 and 12th International Conference on Terahertz Electronics, 2004.","volume":"3 1","pages":"637-638"},"PeriodicalIF":0.0,"publicationDate":"2004-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87559175","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}
引用次数: 0
A two-stream free electron laser for generation of the electromagnetic femto-second wave packages 一种用于产生电磁飞秒波包的双流自由电子激光器
Infrared and Millimeter Waves, Conference Digest of the 2004 Joint 29th International Conference on 2004 and 12th International Conference on Terahertz Electronics, 2004. Pub Date : 2004-01-01 DOI: 10.1109/ICIMW.2004.1422236
V. Kulish, A. Lysenko, I.G. Majornikov
{"title":"A two-stream free electron laser for generation of the electromagnetic femto-second wave packages","authors":"V. Kulish, A. Lysenko, I.G. Majornikov","doi":"10.1109/ICIMW.2004.1422236","DOIUrl":"https://doi.org/10.1109/ICIMW.2004.1422236","url":null,"abstract":"A possibility to construct the powerful source of femto-second wave packages is analyzed. The method as well as a design variant of the system for forming such packages (the multi-harmonic two-stream superheterodyne free electron laser - MTSFEL) are proposed. A characteristic feature of the klystron model considered is the use of the method of synchronous electron beam compression within the interaction MTSFEL volume. It is shown that especially short wave packages (units-tens femto-second) can be obtained in such a way.","PeriodicalId":13627,"journal":{"name":"Infrared and Millimeter Waves, Conference Digest of the 2004 Joint 29th International Conference on 2004 and 12th International Conference on Terahertz Electronics, 2004.","volume":"24 1","pages":"605-606"},"PeriodicalIF":0.0,"publicationDate":"2004-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74294749","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}
引用次数: 2
mm-wave radiation by the undulator type wire antennas 毫米波辐射由波浪形线天线构成
Infrared and Millimeter Waves, Conference Digest of the 2004 Joint 29th International Conference on 2004 and 12th International Conference on Terahertz Electronics, 2004. Pub Date : 2004-01-01 DOI: 10.1109/ICIMW.2004.1422281
A. Vertiy, S. Gavrilov, V. Stepanyuk, A. Salman
{"title":"mm-wave radiation by the undulator type wire antennas","authors":"A. Vertiy, S. Gavrilov, V. Stepanyuk, A. Salman","doi":"10.1109/ICIMW.2004.1422281","DOIUrl":"https://doi.org/10.1109/ICIMW.2004.1422281","url":null,"abstract":"A new type of the mm-waves wire antennas (undulator antennas) is suggested and investigated in the frequency band 26-38.5 GHz. Calculations of the electric field radiation were conducted in the far zone at different frequencies for the undulator antennas with wires bent in shape of sinusoid. Experimental results showed that there are such working regimes of the undulator antennas excited by the traveling current wave, when the undulator antenna radiation is transversely-polarized broadside radiation, which sharply directed with insignificant level of the side lobes. Investigations of the undulator radiation characteristics showed its efficiency for employing as a basic element in different mm-wave devises, for example in aperture arrays.","PeriodicalId":13627,"journal":{"name":"Infrared and Millimeter Waves, Conference Digest of the 2004 Joint 29th International Conference on 2004 and 12th International Conference on Terahertz Electronics, 2004.","volume":"26 1","pages":"695-696"},"PeriodicalIF":0.0,"publicationDate":"2004-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75143239","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}
引用次数: 2
Wideband continuous frequency tunable 330 GHz gyrotron oscillator 宽带连续频率可调330 GHz回旋管振荡器
Infrared and Millimeter Waves, Conference Digest of the 2004 Joint 29th International Conference on 2004 and 12th International Conference on Terahertz Electronics, 2004. Pub Date : 2004-01-01 DOI: 10.1109/ICIMW.2004.1422244
J. Sirigiri, M. Shapiro, R. Temkin
{"title":"Wideband continuous frequency tunable 330 GHz gyrotron oscillator","authors":"J. Sirigiri, M. Shapiro, R. Temkin","doi":"10.1109/ICIMW.2004.1422244","DOIUrl":"https://doi.org/10.1109/ICIMW.2004.1422244","url":null,"abstract":"We present the design of a continuously tunable 330 GHz, 100 W CW gyrotron oscillator with a bandwidth of 2 GHz. The results have been obtained with MAGY, a nonlinear, nonstationary code. The physics of continuous tuning of a gyrotron by varying the operating magnetic field are discussed. The design is based on recent experimental observations of a wideband frequency tuning in a 250 GHz, 50 W CW gyrotron oscillator.","PeriodicalId":13627,"journal":{"name":"Infrared and Millimeter Waves, Conference Digest of the 2004 Joint 29th International Conference on 2004 and 12th International Conference on Terahertz Electronics, 2004.","volume":"150 1","pages":"621-622"},"PeriodicalIF":0.0,"publicationDate":"2004-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75778501","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}
引用次数: 3
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