Pub Date : 2011-12-15DOI: 10.1109/IRMMW-THZ.2011.6105074
I. Konoplev, A. Phipps, A. MacLachlan, A. Cross, C. Robertson, A. Young, A. Phelps
The design of an experiment to study a two-dimensional (2D) cylindrical lattice is presented. We illustrate the mode transformations inside the set-up and discuss planned experiments with the lattice. Investigations of a W-band periodic surface lattice are reported. This lattice is intended for use in a novel W-band surface field Cherenkov maser.
{"title":"W-band two-dimensional periodic surface lattice for a surface field Cherenkov maser","authors":"I. Konoplev, A. Phipps, A. MacLachlan, A. Cross, C. Robertson, A. Young, A. Phelps","doi":"10.1109/IRMMW-THZ.2011.6105074","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2011.6105074","url":null,"abstract":"The design of an experiment to study a two-dimensional (2D) cylindrical lattice is presented. We illustrate the mode transformations inside the set-up and discuss planned experiments with the lattice. Investigations of a W-band periodic surface lattice are reported. This lattice is intended for use in a novel W-band surface field Cherenkov maser.","PeriodicalId":6353,"journal":{"name":"2011 International Conference on Infrared, Millimeter, and Terahertz Waves","volume":"14 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2011-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91204133","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 : 2011-12-15DOI: 10.1109/IRMMW-THZ.2011.6104799
K. Takahashi, K. Kajiwara, Y. Oda, K. Sakamoto
A torus diamond window prototype for an ITER electron cyclotron heating and current drive (EC H&CD) system was fabricated based on the latest design. It was installed in the ITER relevant transmission line and high power-long pulse experiment was carried out. Transmission of 740kW–100sec and was performed. It was observed that the cooling water temperature was stabilized and significant low loss tangent, 5.54 × 10−6 was estimated. The results promise that our torus diamond window is feasible to high power-long pulse transmission.
{"title":"High power-long pulse transmission experiment of torus diamond window for ITER EC H&CD system","authors":"K. Takahashi, K. Kajiwara, Y. Oda, K. Sakamoto","doi":"10.1109/IRMMW-THZ.2011.6104799","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2011.6104799","url":null,"abstract":"A torus diamond window prototype for an ITER electron cyclotron heating and current drive (EC H&CD) system was fabricated based on the latest design. It was installed in the ITER relevant transmission line and high power-long pulse experiment was carried out. Transmission of 740kW–100sec and was performed. It was observed that the cooling water temperature was stabilized and significant low loss tangent, 5.54 × 10−6 was estimated. The results promise that our torus diamond window is feasible to high power-long pulse transmission.","PeriodicalId":6353,"journal":{"name":"2011 International Conference on Infrared, Millimeter, and Terahertz Waves","volume":"67 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2011-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89069046","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 : 2011-12-15DOI: 10.1109/IRMMW-THZ.2011.6104881
First A. Telegin, Second Yu. Sukhorukov, Third N. Loshkareva
A principal model of a high-frequency modulator of infrared radiation working at different temperatures has been created. The modulator is working on the magnetorefractive effect near the Curie temperature of magnetoresistive manganite films in the middle infrared spectral range.
{"title":"Model of infrared modulator based on magnetorefractive effect in manganites","authors":"First A. Telegin, Second Yu. Sukhorukov, Third N. Loshkareva","doi":"10.1109/IRMMW-THZ.2011.6104881","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2011.6104881","url":null,"abstract":"A principal model of a high-frequency modulator of infrared radiation working at different temperatures has been created. The modulator is working on the magnetorefractive effect near the Curie temperature of magnetoresistive manganite films in the middle infrared spectral range.","PeriodicalId":6353,"journal":{"name":"2011 International Conference on Infrared, Millimeter, and Terahertz Waves","volume":"47 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2011-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89130229","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 : 2011-12-15DOI: 10.1109/IRMMW-THZ.2011.6105234
Y. Shin
Novel RF waveguides comprised of composite metamaterials with photonic crystal (PC) slabs have been investigated for terahertz (THz) sheet beam device applications such as high gradient accelerators and coherent radiation power sources. Field and dispersion-relation analyses based on numerical EM simulations showed that the designed dielectric PC slabs filter highly overmoded fundamental passband of a sheet beam plasmonic wave structure (staggered grating pair) within a narrow dynamic frequency range of beam-wave synchronism, capable of avoiding various instabilities such as cutoff- and spurious oscillations. Further investigation on the photonic-band-gap (PBG) effect was also extended to the negative index metamaterial (NIM) of split-ring-resonator (SRR) and wire arrays (wire-SRR). It appears that in the composite waveguide a backward plasmonic wave is superimposed with a forward propagating wave, enhancing field intensity at electric and magnetic resonant frequencies. Currently, a beam-wave interaction is being considered with full 3D particle-in-cell (PIC) simulations and RF-test system construction for proof-of-principle (POP) is under way.
{"title":"Composite metamaterial waveguides for THz sheet beam devices","authors":"Y. Shin","doi":"10.1109/IRMMW-THZ.2011.6105234","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2011.6105234","url":null,"abstract":"Novel RF waveguides comprised of composite metamaterials with photonic crystal (PC) slabs have been investigated for terahertz (THz) sheet beam device applications such as high gradient accelerators and coherent radiation power sources. Field and dispersion-relation analyses based on numerical EM simulations showed that the designed dielectric PC slabs filter highly overmoded fundamental passband of a sheet beam plasmonic wave structure (staggered grating pair) within a narrow dynamic frequency range of beam-wave synchronism, capable of avoiding various instabilities such as cutoff- and spurious oscillations. Further investigation on the photonic-band-gap (PBG) effect was also extended to the negative index metamaterial (NIM) of split-ring-resonator (SRR) and wire arrays (wire-SRR). It appears that in the composite waveguide a backward plasmonic wave is superimposed with a forward propagating wave, enhancing field intensity at electric and magnetic resonant frequencies. Currently, a beam-wave interaction is being considered with full 3D particle-in-cell (PIC) simulations and RF-test system construction for proof-of-principle (POP) is under way.","PeriodicalId":6353,"journal":{"name":"2011 International Conference on Infrared, Millimeter, and Terahertz Waves","volume":"8 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2011-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86489629","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 : 2011-12-15DOI: 10.1109/IRMMW-THZ.2011.6104871
P. Maraghechi, A. Elezzabi
A time resolved study of the THz plasmon dynamics in a random metallic ensemble is presented. This investigation is performed via a THz pump-THz probe experiment. It is illustrated that the electric field of the transmitted THz probe pulse shows an enhancement when the metallic ensemble is first excited by means of a THZ pump pulse. The effect is studied versus the temporal delay of the probe pulse with respect to the pump pulse.
{"title":"Time resolved investigation of THz plasmons in a metallic ensemble","authors":"P. Maraghechi, A. Elezzabi","doi":"10.1109/IRMMW-THZ.2011.6104871","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2011.6104871","url":null,"abstract":"A time resolved study of the THz plasmon dynamics in a random metallic ensemble is presented. This investigation is performed via a THz pump-THz probe experiment. It is illustrated that the electric field of the transmitted THz probe pulse shows an enhancement when the metallic ensemble is first excited by means of a THZ pump pulse. The effect is studied versus the temporal delay of the probe pulse with respect to the pump pulse.","PeriodicalId":6353,"journal":{"name":"2011 International Conference on Infrared, Millimeter, and Terahertz Waves","volume":"3 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2011-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84884554","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 : 2011-12-15DOI: 10.1109/IRMMW-THZ.2011.6105077
B. Knyazev, V. Cherkassky, E. N. Chesnokov, Y. Choporova, M. Dem’yanenko, D. G. Esaev, V. Gerasimov, Y. Getmanov, T. Goryachkovskaya, E. Kolobanov, V. Kubarev, G. Kulipanov, L. Medvedev, E. Naumova, A. Nikitin, A. Nikitin, S. Miginsky, S. Peltek, B. Z. Persov, V. Pickalov, V. Popik, V. Prinz, T. V. Salikova, M. Scheglov, S. Serednyakov, O. Shevchenko, A. Skrinsky, N. Vinokurov, M. Vlasenko, N. S. Zaigraeva
The Novosibirsk FEL (NovoFEL) generates tunable monochromatic coherent radiation as a continuous stream of 100-ps pulses with a repetition rate of up to 11.2 MHz and average power of up to 500 W. After commissioning of the second laser resonator in 2010, the spectral ranges of 120–240 μm and 40–80 μm are available to users. A review of experimental results for the past year is given.
{"title":"Novosibirsk terahertz free electron laser: Facility development and new experimental results at the user stations","authors":"B. Knyazev, V. Cherkassky, E. N. Chesnokov, Y. Choporova, M. Dem’yanenko, D. G. Esaev, V. Gerasimov, Y. Getmanov, T. Goryachkovskaya, E. Kolobanov, V. Kubarev, G. Kulipanov, L. Medvedev, E. Naumova, A. Nikitin, A. Nikitin, S. Miginsky, S. Peltek, B. Z. Persov, V. Pickalov, V. Popik, V. Prinz, T. V. Salikova, M. Scheglov, S. Serednyakov, O. Shevchenko, A. Skrinsky, N. Vinokurov, M. Vlasenko, N. S. Zaigraeva","doi":"10.1109/IRMMW-THZ.2011.6105077","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2011.6105077","url":null,"abstract":"The Novosibirsk FEL (NovoFEL) generates tunable monochromatic coherent radiation as a continuous stream of 100-ps pulses with a repetition rate of up to 11.2 MHz and average power of up to 500 W. After commissioning of the second laser resonator in 2010, the spectral ranges of 120–240 μm and 40–80 μm are available to users. A review of experimental results for the past year is given.","PeriodicalId":6353,"journal":{"name":"2011 International Conference on Infrared, Millimeter, and Terahertz Waves","volume":"112 2 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2011-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89399939","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 : 2011-12-15DOI: 10.1109/IRMMW-THZ.2011.6104788
S. Eliet, M. Guinet, A. Cuisset, F. Hindle, O. Pirali, M. Martin‐Drumel, G. Mouret
Specific investigations onto the hydroxyl radical (OH) and the mercapto radical (SH) are proposed by using a high resolution photomixing spectrometer. The presented results point out clearly the availability of the proposed technique to investigate radical compounds.
{"title":"Detection and analysis of OH and SH radicals by using THz photomixing synthesizer","authors":"S. Eliet, M. Guinet, A. Cuisset, F. Hindle, O. Pirali, M. Martin‐Drumel, G. Mouret","doi":"10.1109/IRMMW-THZ.2011.6104788","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2011.6104788","url":null,"abstract":"Specific investigations onto the hydroxyl radical (OH) and the mercapto radical (SH) are proposed by using a high resolution photomixing spectrometer. The presented results point out clearly the availability of the proposed technique to investigate radical compounds.","PeriodicalId":6353,"journal":{"name":"2011 International Conference on Infrared, Millimeter, and Terahertz Waves","volume":"13 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2011-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88253103","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 : 2011-12-15DOI: 10.1109/IRMMW-THZ.2011.6104807
M. Navarro‐Cía, M. Beruete, M. Sorolla, T. Akalin, N. Engheta
In this presentation advances on metallic lenses based on extreme electromagnetic parameters will be shown: either epsilon near zero or epsilon and mu near zero simultaneously. The former is generated by an array of continuous waveguides at cutoff, whereas the latter is composed of stacked subwavelength hole arrays that can be understood as discontinuous waveguides operating below cutoff.
{"title":"Very low effective electromagnetic parameters lenses for the unlicensed 60 GHz band","authors":"M. Navarro‐Cía, M. Beruete, M. Sorolla, T. Akalin, N. Engheta","doi":"10.1109/IRMMW-THZ.2011.6104807","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2011.6104807","url":null,"abstract":"In this presentation advances on metallic lenses based on extreme electromagnetic parameters will be shown: either epsilon near zero or epsilon and mu near zero simultaneously. The former is generated by an array of continuous waveguides at cutoff, whereas the latter is composed of stacked subwavelength hole arrays that can be understood as discontinuous waveguides operating below cutoff.","PeriodicalId":6353,"journal":{"name":"2011 International Conference on Infrared, Millimeter, and Terahertz Waves","volume":"27 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2011-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86698057","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 : 2011-12-15DOI: 10.1109/IRMMW-THZ.2011.6104861
O. Peters, B. Fischer, M. Koch
Carbon Nanotubes show high potential as an additive for polymers to improve mechanical properties and conductivity. For their employment in compounds, a homogenous distribution is crutial. We present THz spectroscopy as a tool for Nanotube content and homogeneity measurements.
{"title":"Carbon Nanotube concentration and distribution determination with terahertz waves","authors":"O. Peters, B. Fischer, M. Koch","doi":"10.1109/IRMMW-THZ.2011.6104861","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2011.6104861","url":null,"abstract":"Carbon Nanotubes show high potential as an additive for polymers to improve mechanical properties and conductivity. For their employment in compounds, a homogenous distribution is crutial. We present THz spectroscopy as a tool for Nanotube content and homogeneity measurements.","PeriodicalId":6353,"journal":{"name":"2011 International Conference on Infrared, Millimeter, and Terahertz Waves","volume":"27 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2011-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87741276","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 : 2011-12-15DOI: 10.1109/IRMMW-THZ.2011.6105160
M. Liang, W. Ng, Mingguang Tuo, M. Gehm, H. Xin
Terahertz all-dielectric Electromagnetic Crystal (EMXT) waveguide to planar microstrip line transition structures are designed, simulated and fabricated. The design is similar to the ridge coupling structure used in metallic waveguide to microstrip transition. Simulation shows that the insertion loss of a back-to-back transition structure is 4 dB at 100 GHz. Experimental characterizations will also be reported. With this kind of transition structures, efficient integration of low loss all-dielectric THz waveguides to planar integrated circuits can be realized conveniently.
{"title":"Terahertz all-dielectric EMXT waveguide to planar microstrip transition structure","authors":"M. Liang, W. Ng, Mingguang Tuo, M. Gehm, H. Xin","doi":"10.1109/IRMMW-THZ.2011.6105160","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2011.6105160","url":null,"abstract":"Terahertz all-dielectric Electromagnetic Crystal (EMXT) waveguide to planar microstrip line transition structures are designed, simulated and fabricated. The design is similar to the ridge coupling structure used in metallic waveguide to microstrip transition. Simulation shows that the insertion loss of a back-to-back transition structure is 4 dB at 100 GHz. Experimental characterizations will also be reported. With this kind of transition structures, efficient integration of low loss all-dielectric THz waveguides to planar integrated circuits can be realized conveniently.","PeriodicalId":6353,"journal":{"name":"2011 International Conference on Infrared, Millimeter, and Terahertz Waves","volume":"123 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2011-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85677594","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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