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Karpov, A.; Miller, D.; Rice, F.; Zmuidzinas, J.; Stern, J. A.; Bumble, B.; LeDuc, H. G. |
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Title |
Low noise 1.2 THz SIS receiver |
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Conference Article |
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2001 |
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Proc. 12th Int. Symp. Space Terahertz Technol. |
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21-22 |
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San Diego, CA, USA |
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Jet Propulsion Laboratory, California Inst.it.u.t.e of Technology |
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RPLAB @ s @ sis_650K_at_1p13THz |
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316 |
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Author |
Бурмистрова, А. В.; Девятов, И. А. |
![find record details (via OpenURL) openurl](img/xref.gif)
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Расчет электронного транспорта в гетероструктурах, содержащих многозонные сверхпроводники |
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Conference Article |
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2014 |
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Труды XVIII международного симпозиума «Нанофизика и наноэлектроника» |
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1 |
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21-22 |
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N/I/Sp junctions |
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В рамках приближения сильной связи теоретически рассчитаны проводимости контактов вида нормальный металл/изолятор/одноорбитальный сверхпроводник с p-типом сверхпроводящего спаривания (N/I/Sp). Объяснено наблюдаемое экспериментально как появление пика при нулевом напряжении, так и его расщепление в зависимости от толщины слоя изолятора. В рамках этой же микроскопической теории развит вариант техники решеточной функции Грина в мацубаровом представлении. Используя разработанный подход, рассчитаны фазовые и температурные зависимости тока Джозефсона для контакта сверхпроводника s-типа и многозонного железосодержащего сверхпроводника (ферропниктида) для различных ориентаций границы по отношению к кристаллографическим осям пниктида. |
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Нижний Новгород, Россия |
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Russian |
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1834 |
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Kawamura, J.; Blundell, R.; Tong, C-Y. E.; Gol'tsman, G.; Gershenzon, E.; Voronov, B.; Cherednichenko, S. |
![find record details (via OpenURL) openurl](img/xref.gif)
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Title |
Phonon-cooled NbN HEB mixers for submillimeter wavelengths |
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Conference Article |
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1997 |
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Proc. 8th Int. Symp. Space Terahertz Technol. |
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Proc. 8th Int. Symp. Space Terahertz Technol. |
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23-28 |
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waveguide NbN HEB mixers |
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The noise performance of receivers incorporating NbN phonon-cooled superconducting hot electron bolometric mixers is measured from 200 GHz to 900 GHz. The mixer elements are thin-film (thickness — 4 nm) NbN with —5 to 40 pm area fabricated on crystalline quartz sub- strates. The receiver noise temperature from 200 GHz to 900 GHz demonstrates no unexpected degradation with increasing frequency, being roughly TRx ,; 1-2 K The best receiver noise temperatures are 410 K (DSB) at 430 GHz, 483 K at 636 GHz, and 1150 K at 800 GHz. |
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275 |
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Matsushima, F.; Odashima, H.; Iwasaki, T.; Tsunekawa, S.; Takagi, K. |
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Title |
Frequency measurement of pure rotational transitions of H2O from 0.5 to 5 THz |
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Conference Article |
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1994 |
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Conference on precision electromagnetic measurements digest |
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23-24 |
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Frequencies of H2O pure rotational transitions from 0.5 to 5 THz have been measured with an accuracy of one part in 109 using a tunable far-infrared spectrometer. Measured frequencies of more than a hundred spectral lines provide an excellent wavelength and frequency calibration standard for the far infrared. |
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487 |
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Li, Chao-Te; Chen, Tse-Jun; Ni, Tong-Liang; Lu, Wei-Chun; Chiu, Chuang-Ping; Chen, Chong-Wen; Chang, Yung-Chin; Wang, Ming-Jye Shi, Sheng-Cai |
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Title |
Development of SIS mixers for SMA 400-520 GHz band |
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Conference Article |
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Year |
2009 |
Publication |
Proc. 20th Int. Symp. Space Terahertz Technol. |
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24-30 |
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SIS mixer, noise temperature, SMA |
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Abstract |
SIS junction mixers were developed for SMA 400-520 GHz band. The results show receiver noise temperature around 100 K across the band, with noise contribution from RF loss and IF estimated to be around 50 K and 20K, respectively. Two schemes were used to tune out junction's parasitic capacitance. When a parallel inductor is employed, the input impedance is close to Rn, which facilitates impedance matching between the junction and the waveguide probe. Waveguide probes were designed to achieve a low feed-point impedance to match to the junction resistance. Optimum embedding impedances for lower receiver noise temperature were investigated. Performances of two schemes and composition of receiver noise were also discussed. |
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617 |
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