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Author Seliverstov, S.; Maslennikov, S.; Ryabchun, S.; Finkel, M.; Klapwijk, T. M.; Kaurova, N.; Vachtomin, Yu.; Smirnov, K.; Voronov, B.; Goltsman, G.
Title (up) Fast and sensitive terahertz direct detector based on superconducting antenna-coupled hot electron bolometer Type Journal Article
Year 2015 Publication IEEE Trans. Appl. Supercond. Abbreviated Journal IEEE Trans. Appl. Supercond.
Volume 25 Issue 3 Pages 2300304
Keywords HEB detector responsivity, HEB model, numerical calculations, numerical model
Abstract We characterize superconducting antenna-coupled hot-electron bolometers for direct detection of terahertz radiation operating at a temperature of 9.0 K. The estimated value of responsivity obtained from lumped-element theory is strongly different from the measured one. A numerical calculation of the detector responsivity is developed, using the Euler method, applied to the system of heat balance equations written in recurrent form. This distributed element model takes into account the effect of nonuniform heating of the detector along its length and provides results that are in better agreement with the experiment. At a signal frequency of 2.5 THz, the measured value of the optical detector noise equivalent power is 2.0 × 10-13 W · Hz-0.5. The value of the bolometer time constant is 35 ps. The corresponding energy resolution is about 3 aJ. This detector has a sensitivity similar to that of the state-of-the-art sub-millimeter detectors operating at accessible cryogenic temperatures, but with a response time several orders of magnitude shorter.
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Call Number Serial 953
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Author Yates, S. J. C.; Baryshev, A. M.; Baselmans, J. J. A.; Klein, B.; Güsten, R.
Title (up) Fast Fourier transform spectrometer readout for large arrays of microwave kinetic inductance detectors Type Journal Article
Year 2009 Publication Applied Physics Letters Abbreviated Journal Appl. Phys. Lett.
Volume 95 Issue 4 Pages 3
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Abstract Microwave kinetic inductance detectors have great potential for large, very sensitive detector arrays for use in, for example, submillimeter imaging. Being intrinsically readout in the frequency domain, they are particularly suited for frequency domain multiplexing allowing ~1000 s of devices to be readout with one pair of coaxial cables. However, this moves the complexity of the detector from the cryogenics to the warm electronics. We present here the concept and experimental demonstration of the use of fast Fourier transform spectrometer readout, showing no deterioration of the noise performance compared to the low noise analog mixing while allowing high multiplexing ratios.
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Call Number RPLAB @ gujma @ Serial 697
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Author Stevens, M.; Hadfield, R.; Schwall, R.; Nam, S.W.; Mirin, R.; Gupta, J.
Title (up) Fast lifetime measurements of infrared emitters using a low-jitter superconduct- ing single-photon detector Type Journal Article
Year 2006 Publication Applied Physics Letters Abbreviated Journal Appl. Phys. Lett.
Volume 89 Issue Pages 031109
Keywords SSPD, jitter, QD, QW
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Call Number RPLAB @ akorneev @ Serial 611
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Author Zorin, M.; Milostnaya, I.; Gol'tsman, G. N.; Gershenzon, E. M.
Title (up) Fast NbN superconducting switch controlled by optical radiation Type Journal Article
Year 1997 Publication IEEE Trans. Appl. Supercond. Abbreviated Journal IEEE Trans. Appl. Supercond.
Volume 7 Issue 2 Pages 3734-3737
Keywords NbN superconducting switch
Abstract The switching time and the optical control power of the NbN superconducting switch have been measured. The device is based on the ultrathin film 5-8 nm thick patterned as a structure of several narrow parallel strips (/spl sim/1 /spl mu/m wide) connected to wide current leads. The current-voltage characteristic of the switch at temperature 4.2 K demonstrated a hysteresis due to DC current self-heating. We studied the superconducting-to-resistive state transition induced by both optical and bias-current excitations. The optical pulse duration was /spl sim/20 ps and the rise time of the current step was determined to be less than 50 ps. The optical pulse was delivered to the switch by the semiconductor laser through an optical fiber. We found that the measured switching time is less than the duration of the optical excitation. The threshold optical power density does not exceed 3/spl middot/10/sup 3/ W/cm/sup 2/. The proposed device can be used in the fiber input of LTS rapid single flux quantum circuits.
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ISSN 1051-8223 ISBN Medium
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Call Number Serial 1596
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Author Akhmadishina, K. F.; Bobrinetskiy, I. I.; Komarov, I. A.; Malovichko, A. M.; Nevolin, V. K.; Fedorov, G. E.; Golovin, A. V.; Zalevskiy, A. O.; Aidarkhanov, R. D.
Title (up) Fast-response biological sensors based on single-layer carbon nanotubes modified with specific aptamers Type Journal Article
Year 2015 Publication Semicond. Abbreviated Journal Semicond.
Volume 49 Issue 13 Pages 1749-1753
Keywords carbon nanotubes, CNT detectors
Abstract The possibility of the fabrication of a fast-response biological sensor based on a composite of single-layer carbon nanotubes and aptamers for the specific detection of proteins is shown. The effect of modification of the surface of the carbon nanotubes on the selectivity and sensitivity of the sensors is investigated. It is shown that carboxylated nanotubes have a better selectivity for detecting thrombin.
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ISSN 1063-7826 ISBN Medium
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Call Number Serial 1783
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