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Gaggero, A.; Nejad, S. Jahanmiri; Marsili, F.; Mattioli, F.; Leoni, R.; Bitauld, D.; Sahin, D.; Hamhuis, G. J.; Nötzel, R.; Sanjines, R.; Fiore, A. |
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Nanowire superconducting single-photon detectors on GaAs for integrated quantum photonic applications |
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2010 |
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Applied Physics Letters |
Abbreviated Journal |
Appl. Phys. Lett. |
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97 |
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15 |
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3 |
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SSPD |
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We demonstrate efficient nanowire superconducting single photon detectors (SSPDs) based on NbN thin films grown on GaAs. NbN films ranging from 3 to 5 nm in thickness have been deposited by dc magnetron sputtering on GaAs substrates at 350 °C. These films show superconducting properties comparable to similar films grown on sapphire and MgO. In order to demonstrate the potential for monolithic integration, SSPDs were fabricated and measured on GaAs/AlAs Bragg mirrors, showing a clear cavity enhancement, with a peak quantum efficiency of 18.3% at λ = 1300 nm and T = 4.2 K. |
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RPLAB @ gujma @ |
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681 |
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Fu, K.; Zannoni, R.; Chan, C.; Adams, S. H.; Nicholson, J.; Polizzi, E.; Yngvesson, K. S. |
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Terahertz detection in single wall carbon nanotubes |
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Journal Article |
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2008 |
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Applied Physics Letters |
Abbreviated Journal |
Appl. Phys. Lett. |
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92 |
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3 |
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033105 |
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HEB, single wall, carbon nanotube, CNT, SWNT, SWCNT, terahertz detection, THz |
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It is reported that terahertz radiation from 0.69 to 2.54 THz has been sensitively detected in a device consisting of bundles of carbon nanotubes containing single wall metallic carbon nanotubes, quasioptically coupled through a lithographically fabricated antenna, and a silicon lens. The measured data are consistent with a bolometric detection process in the metallic tubes and the devices show promise for operation well above 4.2 K. |
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0003-6951 |
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NEP is not shown |
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566 |
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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 |
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19 |
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2826 |
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HEB |
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543 |
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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 |
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2000 |
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Appl. Phys. Lett. |
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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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Fetterman, H. R.; Tannenwald, P. E.; Clifton, B. J.; Parker, C. D.; Fitzgerald, W. D.; Erickson, N. R. |
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Far-ir heterodyne radiometric measurements with quasioptical Schottky diode mixers |
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1978 |
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Appl. Phys. Lett. |
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Appl. Phys. Lett. |
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33 |
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2 |
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151-154 |
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Schottky |
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Frequency countings close to a phase locked zone in an electronic receiver show a 1/f power spectral density. The noise scaling versus the frequency deviation and the open loop gain are found from Adler's model of the phase locked loop. This fully agrees with experiments performed at 5 MHz on a receiver with a Schottky diode mixer and a low pass filter. The 1/f amplitude and frequency noise due to the whole set of (sub)harmonics is explained from a nonlinear mapping, with a coupling coefficient related to the structure of prime numbers. |
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587 |
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