| Records |
| Author |
Gao, J. R.; Hovenier, J. N.; Yang, Z. Q.; Baselmans, J. J. A.; Baryshev, A.; Hajenius, M.; Klapwijk, T. M.; Adam, A. J. L.; Klaassen, T. O.; Williams, B. S.; Kumar, S.; Hu, Q.; Reno, J. L. |
| Title |
Terahertz heterodyne receiver based on a quantum cascade laser and a superconducting bolometer |
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Journal Article |
| Year |
2005 |
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Appl. Phys. Lett. |
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86 |
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art.num. 244104 |
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RPLAB @ s @ qc_lasers_gao |
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368 |
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Richards, P. L.; Shen, T. M.; Harris, R. E.; Lloyd, F. L. |
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Quasiparticle heterodyne mixing in SIS tunnel junctions |
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Journal Article |
| Year |
1979 |
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Appl. Phys. Lett. |
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34 |
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5 |
Pages |
345-347 |
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MSPU @ s @ SIS_mixing_qua_part_Richards_1979 |
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222 |
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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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Journal Article |
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2001 |
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Appl. Phys. Lett. |
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79 |
Issue |
3 |
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436 |
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RPLAB @ s @ sis_Jackson_2001 |
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314 |
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Swetz, D. S.; Bennett, D. A.; Irwin, K. D.; Schmidt, D. R.; Ullom, J. N. |
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Current distribution and transition width in superconducting transition-edge sensors |
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Journal Article |
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2012 |
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Appl. Phys. Lett. |
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Appl. Phys. Lett. |
| Volume |
101 |
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242603 |
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Present models of the superconducting-to-normal transition in transition-edge sensors (TESs) do not describe the current distribution within a biased TES. This distribution is complicated by normal-metal features that are integral to TES design. We present a model with one free parameter that describes the evolution of the current distribution with bias. To probe the current distribution experimentally, we fabricated TES devices with different current return geometries. Devices where the current return geometry mirrors current flow within the device have sharper transitions, thus allowing for a direct test of the current-flow model.Measurements from these devices show that current meanders through a TES low in the resistivetransition but flows across the normal-metal features by 40% of the normal-state resistance. Comparison of transition sharpness between device designs reveals that self-induced magnetic fields play an important role in determining the width of the superconducting transition. |
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TES, current distribution |
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Recommended by Klapwijk |
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no |
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930 |
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Floet D. W.; Gao J. R.; Klapwijk T. M.; de Korte P. A. J. |
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Bias Dependence of the Thermal Time Constant in Nb Superconducting Diffusion-Cooled HEB Mixers |
Type |
Journal Article |
| Year |
2000 |
Publication |
Appl. Phys. Lett. |
Abbreviated Journal |
Appl. Phys. Lett. |
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77 |
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1719 |
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We present an experimental study of the intermediate frequency bandwidth of a Nb diffusion-cooled hot-electron bolometer mixer for different bias voltages. The measurements show that the bandwidth increases with increasing voltage. Analysis of the data reveals that this effect is mainly caused by a decrease of the intrinsic thermal time of the mixer and that the effect of electrothermal feedback through the intermediate frequency circuit is small. The results are understood using a qualitative model, which takes into account the different effective diffusion constants in the normal and superconducting domains. |
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RPLAB @ atomics90 @ |
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971 |
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