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Lobanov, Y.; Tong, E.; Blundell, R.; Hedden, A.; Voronov, B.; Gol'tsman, G. |
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Large-signal frequency response of an HEB mixer: from 300 MHz to terahertz |
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2011 |
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IEEE Trans. Appl. Supercond. |
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21 |
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3 |
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628-631 |
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waveguide NbN HEB mixers |
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We present a study of the large signal frequency response of an HEB mixer over a wide frequency range. In our experiments, we have subjected the HEB mixer to incident electromagnetic radiation from 0.3 GHz to 1 THz. The mixer element is an NbN film deposited on crystalline quartz. The mixer chip is mounted in a waveguide cavity, coupled to free space with a diagonal horn. At microwave frequencies, electromagnetic radiation is applied through the coaxial bias port of the mixer block. At higher frequencies the input signal passes via the diagonal horn feed. At each frequency, the incident power is varied and a family of I-V curves is recorded. From the curves we identify 3 distinct regimes of operation of the mixer separated by the phonon relaxation frequency and the superconducting energy gap frequency observed at about 3 GHz and 660 GHz respectively. In this paper, we will present observed curves and discuss the results of our experiment. |
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RPLAB @ gujma @ |
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719 |
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Gershenzon, E. M.; Gershenzon, M. E.; Gol'tsman, G. N.; Karasik, B. S.; Semenov, A. D.; Sergeev, A. V. |
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Light-induced heating of electrons and the time of the inelastic electron-phonon scattering in the YBaCuO compound |
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1987 |
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JETP Lett. |
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JETP Lett. |
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46 |
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6 |
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285-287 |
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YBCO HTS HEB |
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For the first time, measurements have been made on the electron energy relaxation time due to the electron--phonon interaction in films of the YBaCuO superconductor. The results indicate a significant intensification of the electron--phonon interaction in this compound as compared with normal superconducting metals. |
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1706 |
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Gershenzon, E. M.; Goltsman, G. N.; Semenov, A. D.; Sergeev, A. V. |
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Limiting characteristic of fast superconducting bolometers |
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1989 |
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Sov. Phys.-Tech. Phys. |
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Sov. Phys.-Tech. Phys. |
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34 |
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195-199 |
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HEB |
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Теоретически и экспериментально исследовано физическое ограничение быстродействия сверхпроводящего болометра. Показано, что минимальная постоянная времени реализуется в условиях электронного разогрева и определяется процессом неупругого электрон-фонон- ного взаимодействия. Сформулированы требования кконструкции «электронного болометра» для достижения предельной чувствительности. Проведено сравнение характеристик электронного болометра и обычных болометров различных типов. |
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О предельных характеристиках быстродействующих серхпроводниковых болометров |
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Gershenzon, E. M.; Gershenson, M. E.; Goltsman, G. N.; Lyulkin, A. M.; Semenov, A. D.; Sergeev, A. V. |
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Title |
Limiting characteristics of fast-response superconducting bolometers |
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1989 |
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Zhurnal Tekhnicheskoi Fiziki |
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Zhurnal Tekhnicheskoi Fiziki |
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59 |
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2 |
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11-120 |
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HEB |
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Теоретически и экспериментально исследовано физическое ограничение быстродействия сверхпроводящего болометра. Показано, что минимальная постоянная времени реализуется в условиях электронного разогрева и определяется процессом неупругого электрон-фонон-ного взаимодействия. Сформулированы требования к конструкции «электронного болометра» для достижения предельной чувствительности. Проведено сравнение характеристик электронного болометра и обычных болометров различных типов. |
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1696 |
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Cherednichenko, S.; Kroug, M.; Merkel, H.; Kollberg, E.; Loudkov, D.; Smirnov, K.; Voronov, B.; Gol'tsman, G.; Gershenzon, E. |
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Title |
Local oscillator power requirement and saturation effects in NbN HEB mixers |
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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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Proc. 12th Int. Symp. Space Terahertz Technol. |
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273-285 |
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NbN HEB mixers, LO power, local oscillator power, saturation effect, dynamic range |
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The local oscillator power required for NbN hot-electron bolometric mixers (P LO ) was investigated with respect to mixer size, critical temperature and ambient temperature. P LO can be decreased by a factor of 10 as the mixer size decreases from 4×0.4 µm 2 to 0.6×0.13 µm 2 . For the smallest volume mixer the optimal local oscillator power was found to be 15 nW. We found that for such mixer no signal compression was observed up to an input signal of 2 nW which corresponds to an equivalent input load of 20,000 K. For a constant mixer volume, reduction of T c can decrease optimal local oscillator power at least by a factor of 2 without a deterioration of the receiver noise temperature. Bath temperature was found to have minor effect on the receiver characteristics. |
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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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