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Gol'tsman, G. N.; Karasik, B. S.; Okunev, O. V.; Dzardanov, A. L.; Gershenzon, E. M.; Ekstrom, H.; Jacobsson, S.; Kollberg, E. |
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Title |
NbN hot electron superconducting mixers for 100 GHz operation |
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Journal Article |
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Year |
1995 |
Publication |
IEEE Trans. Appl. Supercond. |
Abbreviated Journal |
IEEE Trans. Appl. Supercond. |
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5 |
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2 |
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3065-3068 |
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NbN HEB mixers |
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NbN is a promising superconducting material for hot-electron superconducting mixers with an IF bandwidth larger than 1 GHz. In the 1OO GHz frequency range, the following parameters were obtained for 50 /spl Aring/ thick NbN films at 4.2 K: receiver noise temperature (DSB) /spl sim/1000 K; conversion loss /spl sim/10 dB; IF bandwidth /spl sim/1 GHz; and local oscillator power /spl sim/1 /spl mu/W. An increase of the critical current of the NbN film, increased working temperature, and a better mixer matching may allow a broader IF bandwidth up to 2 GHz, reduced conversion losses down to 3-5 dB and a receiver noise temperature (DSB) down to 200-300 K. |
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1051-8223 |
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About LO power required |
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255 |
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Sobolewski, R.; Verevkin, A.; Gol'tsman, G.N.; Lipatov, A.; Wilsher, K. |
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Title |
Ultrafast superconducting single-photon optical detectors and their applications |
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Journal Article |
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Year |
2003 |
Publication |
IEEE Trans. Appl. Supercond. |
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Volume |
13 |
Issue |
2 |
Pages |
1151-1157 |
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Keywords |
NbN SSPD, SNSPD |
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We present a new class of ultrafast single-photon detectors for counting both visible and infrared photons. The detection mechanism is based on photon-induced hotspot formation, which forces the supercurrent redistribution and leads to the appearance of a transient resistive barrier across an ultrathin, submicrometer-width, superconducting stripe. The devices were fabricated from 3.5-nm- and 10-nm-thick NbN films, patterned into <200-nm-wide stripes in the 4 /spl times/ 4-/spl mu/m/sup 2/ or 10 /spl times/ 10-/spl mu/m/sup 2/ meander-type geometry, and operated at 4.2 K, well below the NbN critical temperature (T/sub c/=10-11 K). Continuous-wave and pulsed-laser optical sources in the 400-nm-to 3500-nm-wavelength range were used to determine the detector performance in the photon-counting mode. Experimental quantum efficiency was found to exponentially depend on the photon wavelength, and for our best, 3.5-nm-thick, 100-/spl mu/m/sup 2/-area devices varied from >10% for 405-nm radiation to 3.5% for 1550-nm photons. The detector response time and jitter were /spl sim/100 ps and 35 ps, respectively, and were acquisition system limited. The dark counts were below 0.01 per second at optimal biasing. In terms of the counting rate, jitter, and dark counts, the NbN single-photon detectors significantly outperform their semiconductor counterparts. Already-identified applications for our devices range from noncontact testing of semiconductor CMOS VLSI circuits to free-space quantum cryptography and communications. |
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1051-8223 |
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509 |
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Kawamura, J. H.; Tong, C.-Y.E.; Blundell, R.; Cosmo Papa, D.; Hunter, T. R.; Gol'tsman, G.; Cherednichenko, S.; Voronov, B.; Gershenzon, E. |
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Title |
An 800 GHz NbN phonon-cooled hot-electron bolometer mixer receiver |
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Journal Article |
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1999 |
Publication |
IEEE Trans. Appl. Supercond. |
Abbreviated Journal |
IEEE Trans. Appl. Supercond. |
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9 |
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2 |
Pages |
3753-3756 |
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NbN HEB mixers |
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We describe a heterodyne receiver developed for astronomical applications to operate in the 350 /spl mu/m atmospheric window. The waveguide receiver employs a superconductive NbN phonon-cooled hot-electron bolometer mixer. The double sideband receiver noise temperature closely follows 1 kGHz/sup -1/ across 780-870 GHz, with the intermediate frequency centered at 1.4 GHz. The conversion loss is about 15 dB. The receiver was installed for operation at the University of Arizona/Max Planck Institute for Radio Astronomy Submillimeter Telescope facility. The instrument was successfully used to conduct test observations of a number of celestial sources in a number of astronomically important spectral lines. |
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1051-8223 |
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288 |
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Gol'tsman, G.; Minaeva, O.; Korneev, A.; Tarkhov, M.; Rubtsova, I.; Divochiy, A.; Milostnaya, I.; Chulkova, G.; Kaurova, N.; Voronov, B.; Pan, D.; Kitaygorsky, J.; Cross, A.; Pearlman, A.; Komissarov, I.; Slysz, W.; Wegrzecki, M.; Grabiec, P.; Sobolewski, R. |
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Title |
Middle-infrared to visible-light ultrafast superconducting single-photon detectors |
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Journal Article |
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2007 |
Publication |
IEEE Trans. Appl. Supercond. |
Abbreviated Journal |
IEEE Trans. Appl. Supercond. |
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17 |
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2 |
Pages |
246-251 |
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SSPD, SNSPD |
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We present an overview of the state-of-the-art of NbN superconducting single-photon detectors (SSPDs). Our devices exhibit quantum efficiency (QE) of up to 30% in near-infrared wavelength and 0.4% at 5 mum, with a dark-count rate that can be as low as 10 -4 s -1 . The SSPD structures integrated with lambda/4 microcavities achieve a QE of 60% at telecommunication, 1550-nm wavelength. We have also developed a new generation of SSPDs that possess the QE of large-active-area devices, but, simultaneously, are characterized by low kinetic inductance that allows achieving short response times and the GHz-counting rate with picosecond timing jitter. The improvements presented in the SSPD development, such as fiber-coupled SSPDs, make our detectors most attractive for high-speed quantum communications and quantum computing. |
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1051-8223 |
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431 |
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Author |
Datesman, A.M.; Schultz, J.C.; Lichtenberger, A.W.; Golish, D.; Walker, C.K.; Kooi, J. |
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Title |
Fabrication and characterization of niobium diffusion-cooled hot-electron bolometers on silicon nitride membranes |
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Journal Article |
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Year |
2005 |
Publication |
IEEE Trans. Appl. Supercond. |
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Volume |
15 |
Issue |
2 |
Pages |
928-931 |
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439 |
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Koshelets, V.P.; Dmitriev, P.N.; Ermakov, A.B.; Sobolev, A.S.; Torgashin, M.Y.; Kurin, V.V.; Pankratov, A.L.; Mygind, J. |
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Optimization of the phase-locked flux-flow oscillator for the submm integrated receiver |
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Journal Article |
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2005 |
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IEEE Trans. Appl. Supercond. |
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15 |
Issue |
2 |
Pages |
964-967 |
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SIR |
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1051-8223 |
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515 |
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Koshelets, V. P.; Shitov, S. V.; Ermakov, A. B.; Filippenko, L. V.; Koryukin, O. V.; Khudchenko, A. V.; Torgashin, M. Yu.; Yagoubov, P. A.; Hoogeveen, R. W. M.; Pylypenko, O. M. |
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Superconducting integrated receiver for TELIS |
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Journal Article |
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2005 |
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IEEE Trans. Appl. Supercond. |
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15 |
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2 |
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960-963 |
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1051-8223 |
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517 |
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Koshelets, V. P.; Ermakov, A. B.; Filippenko, L. V.; Khudchenko, A. V.; Kiselev, O. S.; Sobolev, A. S.; Torgashin, M. Y.; Yagoubov, P. A.; Hoogeveen, R. W. M.; Wild, W. |
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Superconducting integrated submillimeter receiver for TELIS |
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Journal Article |
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2007 |
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IEEE Trans. Appl. Supercond. |
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17 |
Issue |
2 |
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336-342 |
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524 |
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Torgashin, Mikhail Yu.; Koshelets, Valery P.; Dmitriev, Pavel N.; Ermakov, Andrey B.; Filippenko, Lyudmila V.; Yagoubov, Pavel A. |
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Title |
Superconducting Integrated Receiver Based on Nb-AlN-NbN-Nb Circuits |
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Journal Article |
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2007 |
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IEEE Trans. Appl. Supercond. |
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17 |
Issue |
2 |
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379-382 |
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1051-8223 |
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525 |
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Baselmans, J. J. A.; Hajenius, M.; Gao, J. R.; Baryshev, A.; Kooi, J.; Klapwijk, T. M.; Voronov, B.; de Korte, P.; Gol'tsman, G. |
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Title |
NbN hot electron bolometer mixers: sensitivity, LO power, direct detection and stability |
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Journal Article |
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Year |
2005 |
Publication |
IEEE Trans. Appl. Supercond. |
Abbreviated Journal |
IEEE Trans. Appl. Supercond. |
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Volume |
15 |
Issue |
2 |
Pages |
484-489 |
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HEB mixers, direct detection effect, stability, Allan variance |
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We demonstrate that the performance of NbN lattice cooled hot electron bolometer mixers depends strongly on the interface quality between the bolometer and the contact structure. Both the receiver noise temperature and the gain bandwidth can be improved by a factor of 2 by cleaning the interface and adding an additional superconducting interlayer to the contact pad. Using this we obtain a double sideband receiver noise temperature of 950 K at 2.5 THz and 4.3 K, using a 0.4/spl times/4 /spl mu/m HEB mixer with a spiral antenna. At the same bias point, we obtain an IF gain bandwidth of 6 GHz. To comply with current demands on THz mixers for use in space based receivers we reduce the device size to 0.15/spl times/1 /spl mu/m and use a twin slot antenna. We report measurements of the noise temperature, LO power requirement, stability and the direct detection effect, using a mixer with a 1.6 THz twin slot antenna and a 1.462 THz solid state LO source with calibrated output power. |
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1051-8223 |
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546 |
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