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Galeazzi, Massimiliano |
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Title |
Fundamental noise processes in TES devices |
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Journal Article |
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2011 |
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IEEE Trans. Appl. Supercond. |
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IEEE Trans. Appl. Supercond. |
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21 |
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3 |
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267-271 |
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Keywords |
TES, Johnson noise, phonon noise, excess noise, flux-flow noise, thermal fluctuation noise |
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Abstract |
Microcalorimeters and bolometers are noise-limited devices, therefore, a proper understanding of all noise sources is essential to predict and interpret their performance. In this paper, I review the fundamental noise processes contributing to Transition Edge Sensor (TES) microcalorimeters and bolometers and their effect on device performance. In particular, I will start with a simple, monolithic device model, moving to a more complex one involving discrete components, to finally move to today's more realistic, comprehensive model. In addition to the basic noise contribution (equilibrium Johnson noise and phonon noise), TES are significantly affected by extra noise, which is commonly referred to as excess noise. Different fundamental processes have been proposed and investigated to explain the origin of this excess noise, in particular near equilibrium non-linear Johnson noise, flux-flow noise, and internal thermal fluctuation noise. Experimental evidence shows that all three processes are real and contribute, at different levels, to the TES noise, although different processes become important at different regimes. It is therefore time to discard the term “excess noise” and consider these terms part of the “fundamental noise processes” instead. |
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Recommended by Klapwijk |
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914 |
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Galin, I.; Schnitzer, C. A.; Dengler, R. J.; Quintero, O. |
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Title |
177–207 GHz radiometer front end, single–side–band measurements |
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Conference Article |
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1999 |
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Proc. 10th Int. Symp. Space Terahertz Technol. |
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70 |
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Charlottesville, Virginia, USA |
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RPLAB @ s @ schottky_Tn_1000_at_0p2THz |
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289 |
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Galin, M. A.; Klushin, A. M.; Kurin, V. V.; Seliverstov, S. V.; Finkel, M. I.; Goltsman, G. N.; Müller, F.; Scheller, T.; Semenov, A. D. |
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Title |
Towards local oscillators based on arrays of niobium Josephson junctions |
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Journal Article |
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2015 |
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Supercond. Sci. Technol. |
Abbreviated Journal |
Supercond. Sci. Technol. |
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28 |
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5 |
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055002 (1 to 7) |
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Josephson junction local oscillators, JJ LO |
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Various applications in the field of terahertz technology are in urgent need of compact, wide-tunable solid-state continuous wave radiation sources with a moderate power. However, satisfactory solutions for the THz frequency range are scarce yet. Here we report on coherent radiation from a large planar array of Josephson junctions (JJs) in the frequency range between 0.1 and 0.3 THz. The external resonator providing the synchronization of JJ array is identified as a straight fragment of a single-strip-line containing the junctions themselves. We demonstrate a prototype of the quasioptical heterodyne receiver with the JJ array as a local oscillator and a hot-electron bolometer mixer. |
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0953-2048 |
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1347 |
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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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Gao, G. 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. |
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A novel terahertz heterodyne receiver based on a quantum cascade laser and a superconducting bolometer |
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2005 |
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Proc. 16th Int. Symp. Space Terahertz Technol. |
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19-23 |
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Göteborg, Sweden |
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RPLAB @ s @ qc_lasers_gao_isstt16 |
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367 |
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