Pub Date : 2011-12-15DOI: 10.1109/IRMMW-THZ.2011.6105251
M. Mizuno, S. Saito, K. Fukunaga, I. Hosako
The absorption properties of three kinds of oriented collagen sheet were measured in a terahertz band. We verified that the absorbance spectra of the three kinds of collagen agreed well, even though the amino acid composition differed. When salt was added to the collagen sheets, a new absorption peak appeared at 168 cm−1.
{"title":"Absorption properties of oriented collagen in terahertz band","authors":"M. Mizuno, S. Saito, K. Fukunaga, I. Hosako","doi":"10.1109/IRMMW-THZ.2011.6105251","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2011.6105251","url":null,"abstract":"The absorption properties of three kinds of oriented collagen sheet were measured in a terahertz band. We verified that the absorbance spectra of the three kinds of collagen agreed well, even though the amino acid composition differed. When salt was added to the collagen sheets, a new absorption peak appeared at 168 cm−1.","PeriodicalId":6353,"journal":{"name":"2011 International Conference on Infrared, Millimeter, and Terahertz Waves","volume":"32 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":"89182161","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.2011.6104835
Stella Bevilacqua, S. Cherednichenko, V. Drakinskiy, H. Shibata, A. Hammar, J. Stake
THz mixers based on superconducting MgB2 bolometers were fabricated by photolithography and Ar-ion beam milling on sapphire substrates. The mixer gain bandwidth of 3.4 GHz, 2.3 GHz and 1.3 GHz were measured for 10, 15 and 30 nm films respectively.
{"title":"Investigation of MgB2 HEB mixer gain bandwidth","authors":"Stella Bevilacqua, S. Cherednichenko, V. Drakinskiy, H. Shibata, A. Hammar, J. Stake","doi":"10.1109/IRMMW-THZ.2011.6104835","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2011.6104835","url":null,"abstract":"THz mixers based on superconducting MgB2 bolometers were fabricated by photolithography and Ar-ion beam milling on sapphire substrates. The mixer gain bandwidth of 3.4 GHz, 2.3 GHz and 1.3 GHz were measured for 10, 15 and 30 nm films respectively.","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":"78978825","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.2011.6104857
D. Wilbert, Lee Butler, W. Baughman, P. Kung, S. Kim
In this work, three-dimensional, stacked split ring resonator arrays exhibiting characteristics at Terahertz frequencies have been designed, simulated, and fabricated. The effects of the ring spatial dimensions on resonant absorption frequencies and relative absorption strength are investigated and reported.
{"title":"Terahertz spectroscopic properties of three-dimensional split-ring resonator arrays","authors":"D. Wilbert, Lee Butler, W. Baughman, P. Kung, S. Kim","doi":"10.1109/IRMMW-THZ.2011.6104857","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2011.6104857","url":null,"abstract":"In this work, three-dimensional, stacked split ring resonator arrays exhibiting characteristics at Terahertz frequencies have been designed, simulated, and fabricated. The effects of the ring spatial dimensions on resonant absorption frequencies and relative absorption strength are investigated and reported.","PeriodicalId":6353,"journal":{"name":"2011 International Conference on Infrared, Millimeter, and Terahertz Waves","volume":"56 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":"79006083","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.2011.6104869
A. Brahm, A. Weigel, S. Riehemann, G. Notni, A. Tunnermann
We present an algorithm operating in THz time-domain that enables us to determine unknown optical parameters of multi-layer systems. We investigated the algorithm with different multi-layer samples measured in THz transmission and reflection.
{"title":"Highly precise parameter extraction of thin multi-layers in THz transmission and reflection geometry","authors":"A. Brahm, A. Weigel, S. Riehemann, G. Notni, A. Tunnermann","doi":"10.1109/IRMMW-THZ.2011.6104869","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2011.6104869","url":null,"abstract":"We present an algorithm operating in THz time-domain that enables us to determine unknown optical parameters of multi-layer systems. We investigated the algorithm with different multi-layer samples measured in THz transmission and reflection.","PeriodicalId":6353,"journal":{"name":"2011 International Conference on Infrared, Millimeter, and Terahertz Waves","volume":"30 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":"76434890","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.2011.6104909
O. Schubert, F. Junginger, B. Mayer, S. Mahrlein, C. Schmidt, D. Brida, A. Pashkin, A. Sell, T. Kampfrath, M. Wolf, A. Leitenstorfer, R. Huber
Intense THz electric and magnetic fields are exploited to drive extreme nonlinearities in semiconductors, magnetically ordered solids, and molecular systems. Electro-optic sampling allows us to perform field-sensitive two-dimensional spectroscopy, including four- and six-wave mixing in indium antimonide, as well as THz bias — optical probe experiments beyond static dielectric breakdown fields. Finally, we introduce a novel scheme for coherent spin control in antiferromagnetic nickel oxide mediated by the THz magnetic field component.
{"title":"Sub-cycle THz nonlinear optics mediated by electric and magnetic field coupling","authors":"O. Schubert, F. Junginger, B. Mayer, S. Mahrlein, C. Schmidt, D. Brida, A. Pashkin, A. Sell, T. Kampfrath, M. Wolf, A. Leitenstorfer, R. Huber","doi":"10.1109/IRMMW-THZ.2011.6104909","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2011.6104909","url":null,"abstract":"Intense THz electric and magnetic fields are exploited to drive extreme nonlinearities in semiconductors, magnetically ordered solids, and molecular systems. Electro-optic sampling allows us to perform field-sensitive two-dimensional spectroscopy, including four- and six-wave mixing in indium antimonide, as well as THz bias — optical probe experiments beyond static dielectric breakdown fields. Finally, we introduce a novel scheme for coherent spin control in antiferromagnetic nickel oxide mediated by the THz magnetic field component.","PeriodicalId":6353,"journal":{"name":"2011 International Conference on Infrared, Millimeter, and Terahertz Waves","volume":"25 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2011-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88414795","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.2011.6104801
F. Pavanello, I. Turer, T. Akalin, S. Vandenbrouck, E. Peytavit, J. Lampin
A novel transition has been conceived from microstrip (MS) to rectangular metallic waveguide (WG) with good matching over a broad band. Electromagnetic (EM) simulations confirm these properties and the actual fabrication has been shown feasible. S-Parameters measurements are underway.
{"title":"Broadband waveguide-to-microstrip transition in W band","authors":"F. Pavanello, I. Turer, T. Akalin, S. Vandenbrouck, E. Peytavit, J. Lampin","doi":"10.1109/IRMMW-THZ.2011.6104801","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2011.6104801","url":null,"abstract":"A novel transition has been conceived from microstrip (MS) to rectangular metallic waveguide (WG) with good matching over a broad band. Electromagnetic (EM) simulations confirm these properties and the actual fabrication has been shown feasible. S-Parameters measurements are underway.","PeriodicalId":6353,"journal":{"name":"2011 International Conference on Infrared, Millimeter, and Terahertz Waves","volume":"587 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":"87273136","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.2011.6105236
Y. Ito, Takayuki Kawakami, T. Sasamori, Y. Isota, R. Ito, M. Honma, T. Nose
A new device structure based on microstrip line (MSL) is proposed to realize the MMW liquid crystal phase shifter. Fundamental characteristics for various device structures are evaluated by using FDTD Method. Here, we investigate in detail about the influence of "through hole" to the MMW propagation, which is the key component of the new device.
{"title":"MMW liquid crystal phase shifter by using novel microstrip structure","authors":"Y. Ito, Takayuki Kawakami, T. Sasamori, Y. Isota, R. Ito, M. Honma, T. Nose","doi":"10.1109/IRMMW-THZ.2011.6105236","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2011.6105236","url":null,"abstract":"A new device structure based on microstrip line (MSL) is proposed to realize the MMW liquid crystal phase shifter. Fundamental characteristics for various device structures are evaluated by using FDTD Method. Here, we investigate in detail about the influence of \"through hole\" to the MMW propagation, which is the key component of the new device.","PeriodicalId":6353,"journal":{"name":"2011 International Conference on Infrared, Millimeter, and Terahertz Waves","volume":"4 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":"87274880","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.2011.6105036
S. Winnerl, M. Orlita, P. Płochocka, P. Kossacki, M. Potemski, T. Winzer, E. Malic, A. Knorr, M. Sprinkle, C. Berger, W. D. de Heer, H. Schneider, M. Helm
We report on carrier relaxation dynamics close to the Dirac point in epitaxially grown graphene under pulsed excitation with 10–250 meV photons. With decreasing photon energy, we identify different regimes — induced transmission with bi- and single-exponential decay as well as induced absorption — and discuss their physical origin.
{"title":"Nonlinear transmission dynamics in graphene close to the Dirac point","authors":"S. Winnerl, M. Orlita, P. Płochocka, P. Kossacki, M. Potemski, T. Winzer, E. Malic, A. Knorr, M. Sprinkle, C. Berger, W. D. de Heer, H. Schneider, M. Helm","doi":"10.1109/IRMMW-THZ.2011.6105036","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2011.6105036","url":null,"abstract":"We report on carrier relaxation dynamics close to the Dirac point in epitaxially grown graphene under pulsed excitation with 10–250 meV photons. With decreasing photon energy, we identify different regimes — induced transmission with bi- and single-exponential decay as well as induced absorption — and discuss their physical origin.","PeriodicalId":6353,"journal":{"name":"2011 International Conference on Infrared, Millimeter, and Terahertz Waves","volume":"5 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":"87284437","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.2011.6105246
A. Arzhannikov, A. Burdakov, P. V. Kalinin, S. Kuznetsov, M. Makarov, K. Mekler, A. Popov, V. Postupaev, A. Rovenskikh, S. Sinitsky, V. Sklyarov, V. Stepanov, Y. Sulyaev, M. Thumm, L. Vyacheslavov
One of possible ways to generate submillimeter wave and THz radiation is to use transformation of plasma waves into electromagnetic radiation at strong Langmuir turbulence [1]. We had already described some implementation of such method at the GOL-3 experiments [2–4], wherein the mechanism of plasma heating was recognized as the excitation of strong Langmuir turbulence (LT) via a two-stream instability induced by the propagating high current beam. The detailed theoretical consideration of LT-induced electromagnetic emission from turbulent plasmas distinguishes two main processes responsible for electromagnetic radiation emission during the beam-plasma interaction at GOL-3. First, plasmon scattering on plasma density fluctuations yields electromagnetic emission at the plasma frequency ωp (“ωp-process”). Second, plasmon-plasmon merging results in production of photons in the vicinity of the double plasma frequency 2ωp (“2ωp-process”). For plasma densities of 1014–1015 cm−3, corresponding output radiation frequencies are located in the range from mm to sub-mm waves, ωP/2π ≌ 90–283 GHz, 2ωP/2π ≌ 180–566 GHz.
{"title":"Emission of submm-radiation by strong turbulent plasma at two-stream instability of high current REB","authors":"A. Arzhannikov, A. Burdakov, P. V. Kalinin, S. Kuznetsov, M. Makarov, K. Mekler, A. Popov, V. Postupaev, A. Rovenskikh, S. Sinitsky, V. Sklyarov, V. Stepanov, Y. Sulyaev, M. Thumm, L. Vyacheslavov","doi":"10.1109/IRMMW-THZ.2011.6105246","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2011.6105246","url":null,"abstract":"One of possible ways to generate submillimeter wave and THz radiation is to use transformation of plasma waves into electromagnetic radiation at strong Langmuir turbulence [1]. We had already described some implementation of such method at the GOL-3 experiments [2–4], wherein the mechanism of plasma heating was recognized as the excitation of strong Langmuir turbulence (LT) via a two-stream instability induced by the propagating high current beam. The detailed theoretical consideration of LT-induced electromagnetic emission from turbulent plasmas distinguishes two main processes responsible for electromagnetic radiation emission during the beam-plasma interaction at GOL-3. First, plasmon scattering on plasma density fluctuations yields electromagnetic emission at the plasma frequency ω<inf>p</inf> (“ω<inf>p</inf>-process”). Second, plasmon-plasmon merging results in production of photons in the vicinity of the double plasma frequency 2ω<inf>p</inf> (“2ω<inf>p</inf>-process”). For plasma densities of 10<sup>14</sup>–10<sup>15</sup> cm<sup>−3</sup>, corresponding output radiation frequencies are located in the range from mm to sub-mm waves, ω<inf>P</inf>/2π ≌ 90–283 GHz, 2ω<inf>P</inf>/2π ≌ 180–566 GHz.","PeriodicalId":6353,"journal":{"name":"2011 International Conference on Infrared, Millimeter, and Terahertz Waves","volume":"36 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":"87320640","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.2011.6105165
M. Nazarov, A. Shkurinov, J. Coutaz
We study the propagation of THz surface plasmon (SP) on flat metal surfaces and we propose an explanation for the unexpected low SP propagation length. Together, we present results of Bragg reflection of SPs at a grating engraved at the metal surface. THz time-domain spectroscopy allows us to identify all the diffractive processes at the grating.
{"title":"Bragg reflection of THz surface plasmon propagating over a diffraction grating","authors":"M. Nazarov, A. Shkurinov, J. Coutaz","doi":"10.1109/IRMMW-THZ.2011.6105165","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2011.6105165","url":null,"abstract":"We study the propagation of THz surface plasmon (SP) on flat metal surfaces and we propose an explanation for the unexpected low SP propagation length. Together, we present results of Bragg reflection of SPs at a grating engraved at the metal surface. THz time-domain spectroscopy allows us to identify all the diffractive processes at the grating.","PeriodicalId":6353,"journal":{"name":"2011 International Conference on Infrared, Millimeter, and Terahertz Waves","volume":"74 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":"85602053","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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