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Author |
Phillips, T. G.; Jefferts, K. B. |
![find record details (via OpenURL) openurl](https://db.rplab.ru/refbase/img/xref.gif)
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Title |
A low temperature bolometer heterodyne receiver for Millimeter wave astronomy |
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Journal Article |
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1973 |
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Rev. Sci. Instrum. |
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Rev. Sci. Instrum. |
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44 |
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8 |
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1009-1014 |
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InSb HEB mixer |
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Liquid helium cooled InSb hot electronbolometers are used in a balanced mixer configuration as detectors for an imagelessmicrowave receiver. The system is designed for mounting at the prime focus of the National Radio Astronomy Observatory (NRAO) 11 m antenna at Kitt Peak, Arizona, and is suitable for the study of rotational line spectra of interstellar gas molecules. Currently the operating frequency is in the 90–140 GHz band where the double sideband system noise temperature is 250 K. |
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Recommended by Klapwijk |
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927 |
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Kaurova, N. S.; Finkel, M. I.; Maslennikov, S. N.; Vahtomin, Yu. B.; Antipov, S. V.; Smirnov, K. V.; Voronov, B. M.; Gol'tsman, G. N.; Ilyin, K. S. |
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Title |
Submillimeter mixer based on YBa2Cu3O7-x thin film |
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Conference Article |
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2004 |
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Proc. 1-st conf. Fundamental problems of high temperature superconductivity |
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291 |
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HTS, HEB mixer |
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Moscow-Zvenigorod |
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Moscow-Zvenigorod |
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355 |
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Korneev, A.; Finkel, M.; Maslennikov, S.; Korneeva, Yu.; Florya, I.; Tarkhov, M.; Elezov, M.; Ryabchun, S.; Tretyakov, I.; Isupova, A.; Voronov, B.; Goltsman, G. |
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Superconducting NbN terahertz detectors and infrared photon counters |
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2010 |
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Вестник НГУ. Серия: физ. |
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Вестник НГУ. Серия: физ. |
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5 |
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4 |
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68-72 |
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HEB; HEB mixer |
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We present our recent achievements in the development of sensitive and ultrafast thin-film superconducting sensors: hot-electron bolometers (HEB), HEB-mixers for terahertz range and infrared single-photon counters. These sensors have already demonstrated a performance that makes them devices-of-choice for many terahertz and optical applications. Keywords: Hot electron bolometer mixers, infrared single-photon detectors, superconducting device fabrication, superconducting NbN films. |
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1818-7994 |
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УДК 538.9 |
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RPLAB @ gujma @ |
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708 |
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Il'in, K. S.; Gol'tsman, G. N.; Voronov, B. M.; Sobolewski, Roman |
![find record details (via OpenURL) openurl](https://db.rplab.ru/refbase/img/xref.gif)
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Title |
Characterization of the electron energy relaxation process in NbN hot-electron devices |
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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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Proc. 10th Int. Symp. Space Terahertz Technol. |
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390-397 |
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Keywords ![sorted by Keywords field, descending order (down)](https://db.rplab.ru/refbase/img/sort_desc.gif) |
HEB mixers, SSPD, SNSPD, NbN films, Nb films |
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We report on transient measurements of electron energy relaxation in NbN films with 300-fs time resolution. Using an electro-optic sampling technique, we have studied the photoresponse of 3.5-nm-thick NbN films deposited on sapphire substrates and exposed to 100-fs-wide optical pulses. Our experimental data analysis was based on the two-temperature model and has shown that in our films at the superconducting transition 10.5 K the inelastic electron-phonon scattering time was about (111}+-__.2) ps. This response time indicated that the maximum intermediate-frequency band of a NbN hot-electron phonon-cooled mixer should reach (16+41-3) GHz if one eliminates the bolometric phonon-heating effect. We have suggested several ways to increase the effectiveness of phonon cooling to achieve the above intrinsic value of the NbN mixer bandwidth. |
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1576 |
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Semenov, A. D.; Gol'tsman, G. N. |
![goto web page (via DOI) doi](https://db.rplab.ru/refbase/img/doi.gif)
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Title |
Non-thermal response of a diffusion-cooled hot-electron bolometer |
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Journal Article |
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1999 |
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IEEE Trans. Appl. Supercond. |
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IEEE Trans. Appl. Supercond. |
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9 |
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2 |
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4491-4494 |
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HEB mixers, non-thermal |
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We present an analysis of a diffusion-cooled hot-electron bolometer in the limiting case of a weak thermalization of non-equilibrium quasiparticles. We propose a new model relying on the non-thermal suppression of the superconducting energy gap by excess quasiparticles. Using material parameters typical for Al, we evaluate performance of the bolometer in the heterodyne regime at terahertz frequencies. Estimates show that the mixer may have quantum limited noise temperature and a few tens of GHz bandwidth, while the required local oscillator power is in the /spl mu/W range due to in-effective suppression of the energy gap by quasiparticles with high energies. |
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1051-8223 |
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1567 |
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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. |
![goto web page (via DOI) doi](https://db.rplab.ru/refbase/img/doi.gif)
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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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2005 |
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IEEE Trans. Appl. Supercond. |
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IEEE Trans. Appl. Supercond. |
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15 |
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2 |
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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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Kawamura, J.; Hunter, T. R.; Tong, C. Y. E.; Blundell, R.; Papa, D. C.; Patt, F.; Peters, W.; Wilson, T.; Henkel, C.; Goltsman, G.; Gershenzon, E. |
![goto web page (via DOI) doi](https://db.rplab.ru/refbase/img/doi.gif)
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Ground-based terahertz CO spectroscopy towards Orion |
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Journal Article |
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2002 |
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A&A |
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A&A |
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394 |
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1 |
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271-274 |
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HEB mixers, applications |
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Using a superconductive hot-electron bolometer heterodyne receiver on the 10-m Heinrich Hertz Telescope on Mount Graham, Arizona, we have obtained velocity-resolved 1.037 THz CO () spectra toward several positions along the Orion Molecular Cloud (OMC-1) ridge. We confirm the general results of prior observations of high-J CO lines that show that the high temperature, , high density molecular gas, , is quite extended, found along a ~ region centered on BN/KL. However, our observations have significantly improved angular resolution, and with a beam size of we are able to spatially and kinematically discriminate the emission originating in the extended quiescent ridge from the very strong and broadened emission originating in the compact molecular outflow. The ridge emission very close to the BN/KL region appears to originate from two distinct clouds along the line of sight with and ≈ . The former component dominates the emission to the south of BN/KL and the latter to the north, with a turnover point coincident with or near BN/KL. Our evidence precludes a simple rotation of the inner ridge and lends support to a model in which there are multiple molecular clouds along the line of sight towards the Orion ridge. |
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Gershenzon, E. M.; Gol'tsman, G. N.; Gogidze, I. G.; Gusev, Yu. P.; Elantiev, A. I.; Karasik, B. S.; Semenov, A. D. |
![find record details (via OpenURL) openurl](https://db.rplab.ru/refbase/img/xref.gif)
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Millimeter and submillimeter wave range mixer based on electronic heating of superconducting films in the resistive state |
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1990 |
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Sov. Supercond. |
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Sov. Supercond. |
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3 |
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10 |
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1582-1597 |
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HEB mixers |
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Karasik, B. S.; Elantiev, A. I. |
![find record details (via OpenURL) openurl](https://db.rplab.ru/refbase/img/xref.gif)
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Title |
Analysis of the noise performance of a hot-electron superconducting bolometer mixer |
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Conference Article |
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1995 |
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Proc. 6th Int. Symp. Space Terahertz Technol. |
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Proc. 6th Int. Symp. Space Terahertz Technol. |
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229-246 |
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Keywords ![sorted by Keywords field, descending order (down)](https://db.rplab.ru/refbase/img/sort_desc.gif) |
HEB mixers |
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A theoretical analysis for the noise temperature of hot–electron superconducting mixer has been presented. Thecontributions of both Johnson noise and electron temperature fluctuations have been evaluated. A set of criteriaensuring low noise performance of the mixer has been stated and a simple analytic expression for the noisetemperature of the mixer device has been suggested. It has been shown that an improvement of the mixer sensitivitydoes not necessarily follow by a decrease of the bandwidth. An SSB noise temperature limit due to the intrinsic noisemechanisms has been estimated to be as low as 40–90 K for a mixer device made from Nb or NbN thin film.Furthermore, the conversion gain bandwidth can be as wide as is allowed by the intrinsic electron temperaturerelaxation time if an appropriate choice of the mixer resistance has been made. The intrinsic mixer noise bandwidthis of 3 GHz for Nb device and of 5 GHz for NbN device. An additional improvement of the theory has been madewhen a distinction between the impedance measured at high intermediate frequency (larger than the mixerbandwidth) and the mixer ohmic resistance has been taken into account.Recently obtained experimental data on Nb and NbNbolometer mixer devices are viewed in connection with thetheoretical predictions.The noise temperature limit has also been specified for the mixer device where an outdiffusion coolingmechanism rather than the electron–phonon energy relaxation determines the mixer bandwidth. A consideration ofthe noise performance of a bolometer mixer made from YBaCuO film utilizing a hot–electron effect has been done. |
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Pasadena, Ca |
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Ozhegov, R. V.; Gorshkov, K. N.; Okunev, O. V.; Gol’tsman, G. N. |
![goto web page (via DOI) doi](https://db.rplab.ru/refbase/img/doi.gif)
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Superconducting hot-electron bolometer mixer as element of thermal imager matrix |
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2010 |
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Tech. Phys. Lett. |
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Tech. Phys. Lett. |
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36 |
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11 |
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1006-1008 |
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Keywords ![sorted by Keywords field, descending order (down)](https://db.rplab.ru/refbase/img/sort_desc.gif) |
HEB mixers |
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The possibility of using a matrix of sensitive elements on a 12-mm-diameter hyperhemispherical lens in a thermal imager operating in the terahertz range has been studied. Dimensions of a lens region acceptable for arrangement of the matrix, in which the receiver noise temperature varies within 16% of the mean value, are determined to be 3.3% of the lens diameter. Deviations of the main lobe of the directivity pattern are evaluated, which amount to ±1.25° relative to the direction toward the optimum position of a mixer. The fluctuation sensitivity of the receiver measured in experiment is 0.5 K at a frequency of 300 GHz. |
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1063-7850 |
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