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Zhang, W.; Miao, W.; Zhong, J. Q.; Shi, S. C.; Hayton, D. J.; Vercruyssen, N.; Gao, J. R.; Goltsman, G. N. |
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Title |
Temperature dependence of the receiver noise temperature and IF bandwidth of superconducting hot electron bolometer mixers |
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Year |
2014 |
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Supercond. Sci. Technol. |
Abbreviated Journal |
Supercond. Sci. Technol. |
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27 |
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8 |
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085013 (1 to 5) |
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Keywords |
NbN HEB mixers |
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In this paper we study the temperature dependence of the receiver noise temperature and IF noise bandwidth of superconducting hot electron bolometer (HEB) mixers. Three superconducting NbN HEB devices of different transition temperatures (Tc) are measured at 0.85 THz and 1.4 THz at different bath temperatures (Tbath) between 4 K and 9 K. Measurement results demonstrate that the receiver noise temperature of superconducting NbN HEB devices is nearly constant for Tbath/Tc, less than 0.8, which is consistent with the simulation based on a distributed hot-spot model. In addition, the IF noise bandwidth appears independent of Tbath/Tc, indicating the dominance of phonon cooling in the investigated HEB devices. |
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0953-2048 |
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1358 |
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Zhang, W.; Miao, W.; Yao, Q. J.; Lin, Z. H.; Shi, S. C.; Gao, J. R.; Goltsman, G. N. |
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Title |
Spectral response and noise temperature of a 2.5 THz spiral antenna coupled NbN HEB mixer |
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Journal Article |
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2012 |
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Phys. Procedia |
Abbreviated Journal |
Phys. Procedia |
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36 |
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334-337 |
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Keywords |
NbN HEB mixer |
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We report on a 2.5 THz spiral antenna coupled NbN hot electron bolometer (HEB) mixers, fabricated with in-situ process. The receiver noise temperature with lowest value of 1180 K is in good agreement with calculated quantum efficiency factor as a function of bias voltage. In addition, the measured spectral response of the spiral antenna coupled NbN HEB mixer shows broad frequency coverage of 0.8-3 THz, and corrected response for optical losses, FTS, and coupling efficiency between antenna and bolometer falls with frequency due to diffraction-limited beam of lens/antenna combination. |
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1875-3892 |
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1381 |
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Floet, D. Wilms; Baselmans, J. J. A.; Klapwijk, T. M.; Gao, J. R. |
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Resistive transition of niobium superconducting hot-electron bolometer mixers |
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1998 |
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Applied Physics Letters |
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Appl. Phys. Lett. |
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73 |
Issue |
19 |
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2826 |
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HEB |
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0003-6951 |
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543 |
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Ganzevles, W. F. M.; Gao, J. R.; de Korte, P. A. J.; Klapwijk, T. M. |
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Direct response of microstrip line coupled Nb THz hot-electron bolometer mixers |
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2001 |
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Applied Physics Letters |
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Appl. Phys. Lett. |
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79 |
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15 |
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2483-2485 |
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0003-6951 |
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311 |
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Jackson, B. D.; Baryshev, A. M.; de Lange, G.; Gao, J. R.; Shitov, S. V.; Iosad, N. N.; Klapwijk, T. M. |
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Low-noise 1 THz superconductor-insulator-superconductor mixer incorporating a NbTiN/SiO2/Al tuning circuit |
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2001 |
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Appl. Phys. Lett. |
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79 |
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3 |
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436 |
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RPLAB @ s @ sis_Jackson_2001 |
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314 |
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