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Author |
Alexandre Karpov; David Miller; Rice, Frank R.; Stern, Jeffrey A.; Bruce Bumble; LeDuc, Henry G.; Jonas Zmuidzinas |
Title |
Low-noise SIS mixer for far-infrared radio astronomy |
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Conference Article |
Year |
2004 |
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Proc. SPIE |
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5498 |
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616-621 |
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Glasgow, Scotland, UK |
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RPLAB @ s @ nt_SIS_550at1p2THz |
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353 |
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Moore, D.P.; Remedios, J. J.; Waterfall, A. M.; Burgess, A. |
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Measuring halocarbons from the MIPAS instrument |
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Miscellaneous |
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2004 |
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RPLAB @ s @ |
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441 |
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Yu, B; Zeng, F; Yang, Y; Xing, Q; Chechin, A; Xin, X; Zeylikovich, I; Alfano R. R. |
Title |
Torsional vibrational modes of tryptophan studied by terahertz time-domain spectroscopy |
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Journal Article |
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2004 |
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Biophys. J. |
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86 |
Issue |
3 |
Pages |
1649-1654 |
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THz applications |
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491 |
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Ciulin, V.; Carter, S. G.; Sherwin, M. S. |
Title |
Terahertz optical mixing in biased GaAs single quantum wells |
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Journal Article |
Year |
2004 |
Publication |
Phys. Rev. B |
Abbreviated Journal |
Phys. Rev. B |
Volume |
70 |
Issue |
11 |
Pages |
115312-(1-6) |
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optical mixing |
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1098-0121 |
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501 |
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Koshelets, V. P. |
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Integrated superconducting submm receivers |
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Miscellaneous |
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2004 |
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SIR |
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511 |
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Title |
Statue of the SIR program for SR&T (extension to 1 THz) |
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Miscellaneous |
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2004 |
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512 |
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Koshelets, V. P.; Shitov, S. V.; Dmitriev, P. N., Ermakov, A. B.; Filippenko, L. V.; Koryukin, O.V.; Sobolev, A.S.; Torgashin, M.Yu.; Yagoubov, P.; Hoogeveen, R. |
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Integrated submillimeter and terahertz receivers with superconducting local oscillator |
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2004 |
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Presanted at 8th International Workshop “From Andreev Reflection to the International Space Station” |
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513 |
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Koshelets, V. P.; Dmitriev, P. N.; Ermakov, A. B.; Filippenko, L. V.; Khudchenko, A. V.; Koryukin, O. V.; Torgashin, M. Yu.; Hoogeveen, R.; Vreeling, W. J.; Yagoubov, P. |
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SIR for TELIS (post-critical) review |
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Miscellaneous |
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2004 |
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516 |
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Korneev, A.; Kouminov, P.; Matvienko, V.; Chulkova, G.; Smirnov, K.; Voronov, B.; Gol'tsman, G. N.; Currie, M.; Lo, W.; Wilsher, K.; Zhang, J.; Słysz, W.; Pearlman, A.; Verevkin, A.; Sobolewski, Roman |
Title |
Sensitivity and gigahertz counting performance of NbN superconducting single-photon detectors |
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Journal Article |
Year |
2004 |
Publication |
Appl. Phys. Lett. |
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Appl. Phys. Lett. |
Volume |
84 |
Issue |
26 |
Pages |
5338-5340 |
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SSPD, NEP, QE |
Abstract |
We have measured the quantum efficiencysQEd, GHz counting rate, jitter, and noise-equivalentpowersNEPdof nanostructured NbN superconducting single-photon detectorssSSPDsdin thevisible to infrared radiation range. Our 3.5-nm-thick and 100- to 200-nm-wide meander-typedevices(total area 10310mm2), operating at 4.2 K, exhibit an experimental QE of up to 20% inthe visible range and,10% at 1.3 to 1.55mm wavelength and are potentially sensitive up tomidinfrareds,10mmdradiation. The SSPD counting rate was measured to be above 2 GHz withjitter,18 ps, independent of the wavelength. The devices’ NEP varies from,10−17W/Hz1/2for1.55mm photons to,10−20W/Hz1/2for visible radiation. Lowering the SSPD operatingtemperature to 2.3 K significantly enhanced its performance, by increasing the QE to,20% andlowering the NEP level to,3310−22W/Hz1/2, both measured at 1.26mm wavelength. |
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0003-6951 |
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532 |
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Author |
Siddiqi, I.; Prober, D. E. |
Title |
Nb–Au bilayer hot-electron bolometers for low-noise THz heterodyne detection |
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Journal Article |
Year |
2004 |
Publication |
Applied Physics Letters |
Abbreviated Journal |
Appl. Phys. Lett. |
Volume |
84 |
Issue |
8 |
Pages |
1404 |
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HEB, mixers, dynamic range, saturation, LO power, local oscillator power, Nb |
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The sensitivity of present Nb diffusion-cooled hot-electron bolometer (HEB) mixers is not quantum limited, and can be improved by reducing the superconducting transition temperature TC. Lowering TC reduces thermal fluctuations, resulting in a decrease of the mixer noise temperature TM. However, lower TC mixers have reduced dynamic range and saturate more easily due to background noise. We present 30 GHz microwave measurements on a bilayer HEB system, Nb–Au, in which TC can be tuned with Au layer thickness to obtain the maximum sensitivity for a given noise background. These measurements are intended as a guide for the optimization of THz mixers. Using a Nb–Au mixer with TC = 1.6 K, we obtain TM = 50 K with 2 nW of local oscillator (LO) power. Good mixer performance is observed over a wide range of LO power and bias voltage and such a device should not exhibit saturation in a THz receiver. |
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0003-6951 |
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571 |
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