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Benford, Dominic J.; Gaidis, Michael C.; Kooi, Jacob W. |
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Title |
Optical properties of Zitex in the infrared to submillimeter |
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Journal Article |
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Year |
2003 |
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Applied Optics |
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Appl. Opt. |
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42 |
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25 |
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5118 |
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0003-6935 |
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440 |
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Kostiuk, Theodor |
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Title |
Heterodyne spectroscopy in the thermal infrared region: a window on physics and chemistry |
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2003 |
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Proc. International Thermal Detectors Workshop (TDW'03), session 7 (Heterodyne detectors) |
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HgCdTe detector |
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3501 University Boulevar East Adelphi, MD 20783 |
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University of Maryland Inn and Conference Center |
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372 |
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Snyder Hale, David D. |
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A thermal infrared heterodyne receiver with applications to astronomy |
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2003 |
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Berkeley, CA 94720 |
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373 |
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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 |
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1151-1157 |
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NbN SSPD, SNSPD |
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Abstract |
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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Author |
Stéphane Claude |
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Title |
Sideband-separating SIS mixer for ALMA band 7, 275–370 GHz |
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Conference Article |
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2003 |
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Proc. 14th Int. Symp. Space Terahertz Technol. |
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41 |
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Tucson, USA |
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no |
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RPLAB @ s @ nt_SIS_60at0p34THz |
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333 |
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Author |
Grimes, P.; Kittara, P.; Yassin, G.; Withington, S.; Jacobs, K. |
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Title |
Investigation of the performance of a 700 GHz nline mixer |
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Conference Article |
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2003 |
Publication |
Proc. 14th Int. Symp. Space Terahertz Technol. |
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247 |
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Tucson, USA |
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no |
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RPLAB @ s @ nt_SIS_250at0p69THz |
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336 |
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Author |
Amato, Michael J.; Benford, Dominic J.; Moseley, Harvey S.; Juan Roman |
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Title |
An engineering concept and enabling technologies for a large single aperture far-infrared observatory (SAFIR) |
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Conference Article |
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2003 |
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Proc. SPIE |
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4850 |
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1120-1131 |
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RPLAB @ s @ sun_shield_SAFIR_SPIE_2003 |
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339 |
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Author |
Albert Betz; Rita Boreiko; Yongdong Zhou; Jun Jhao; Yusuf Selamet; Yong Chang; Renganathan Ashokan; Charlie Bukcer; Sivalingam Sivanathan |
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Title |
HgCdTe photoconductive mixers for 3-15 terahertz |
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Conference Article |
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Year |
2003 |
Publication |
Proc. 14th Int. Symp. Space Terahertz Technol. |
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102-111 |
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Tucson, USA |
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RPLAB @ s @ HgCdTe_at3to15THz_fabr |
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338 |
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Semenov, A. D.; Hübers, Heinz-Wilhelm; Richter, H.; Birk, M.; Krocka, M.; Mair, U.; Vachtomin, Yu. B.; Finkel, M. I.; Antipov, S. V.; Voronov, B. M.; Smirnov, K. V.; Kaurova, N. S.; Drakinski, V. N.; Gol'tsman, G. N. |
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Title |
Superconducting hot-electron bolometer mixer for terahertz heterodyne receivers |
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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 |
168-171 |
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Keywords |
NbN HEB mixers |
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Abstract |
We present recent results showing the development of superconducting NbN hot-electron bolometer mixer for German receiver for astronomy at terahertz frequencies and terahertz limb sounder. The mixer is incorporated into a planar feed antenna, which has either logarithmic spiral or double-slot configuration, and backed on a silicon lens. The hybrid antenna had almost frequency independent and symmetric radiation pattern slightly broader than expected for a diffraction limited antenna. At 2.5 THz the best 2200 K double side-band receiver noise temperature was achieved across a 1 GHz intermediate frequency bandwidth centred at 1.5 GHz. For this operation regime, a receiver conversion efficiency of -17 dB was directly measured and the loss budget was evaluated. The mixer response was linear at load temperatures smaller than 400 K. Implementation of the MgO buffer layer on Si resulted in an increased 5.2 GHz gain bandwidth. The receiver was tested in the laboratory environment by measuring a methanol emission line at 2.5 THz. |
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343 |
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Author |
Gol'tsman, G. N.; Loudkov, D. N. |
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Terahertz superconducting hot-electron bolometer mixers and their application in radio astronomy |
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Journal Article |
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2003 |
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Radiophys. Quant. Electron. |
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46 |
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8/9 |
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604-617 |
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NbN HEB mixers |
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We review the latest developments, research, and radioastronomy applications of hot-electron bolometer (HEB) mixers operated in the terahertz waveband. The physical principles of operation of terahertz HEB mixers are presented, their manufacturing from ultrathin NbN films, the main HEB-mixer parameters and their measurement techniques are discussed, and practical terahertz radioastronomy projects based on heterodyne receivers with HEB mixers are considered. |
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0033-8443 |
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UDC 537.312.62 |
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472 |
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Author |
Гольцман, Г.Н.; Лудков, Д.Н. |
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Title |
Сверхпроводниковые смесители на горячих электронах терагерцового диапазона и их применение в радиоастрономии |
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Journal Article |
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2003 |
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Изв. высших учебных заведений. Радиофизика |
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46 |
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8/9 |
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HEB, mixers |
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russian |
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RPLAB @ s @ |
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473 |
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InSb detectors technical data sheet |
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Miscellaneous |
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2003 |
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InSb, detector |
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476 |
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Tong, C.-Y.E.; Meledin, D.V.; Marrone, D.P.; Paine, S.N.; Gibson, H.; Blundell, R. |
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Title |
Near field vector beam measurements at 1 THz |
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Journal Article |
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2003 |
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IEEE Microw. Compon. Lett. |
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13 |
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6 |
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235-237 |
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HEB, mixer, waveguide, LO power, local oscillator power, saturation effect, dynamic range |
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We have performed near-field vector beam measurements at 1.03 THz to characterize and align the receiver optics of a superconducting receiver. The signal source is a harmonic generator mounted on an X-Y translation stage. We model the measured two-dimensional complex beam pattern by a fundamental Gaussian mode, from which we derive the position of the beam center, the beam radius and the direction of propagation. By performing scans in the planes separated by 400 mm, we have confirmed that our beam pattern measurements are highly reliable. |
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1531-1309 |
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RPLAB @ lobanovyury @ |
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574 |
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Myasnikova, S. E.; Parshin, V.V.; van't Klooster, K.; Valsecchi, G. |
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Reflectivity of antenna and mirrors reflectors at 110 and 200 GHz |
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Conference Article |
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2003 |
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Proc. 4th international conference on antenna theory and techniques |
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2 |
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624- 627 |
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mirror, reflection index, emissivity, reflectivity, mirror, Fabry-Perot interferometer, subterahertz, subTHz |
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Abstract |
Reflectivity (reflection loss) investigations of nickel samples with different types of surface finish, with and without rhodium coating, have been carried out in the 110-200 GHz frequency range on an installation developed in the Applied Physics Institute of Russia. The reflectivity measurements of high quality silver coated and gold coated mirrors are also presented. The reflectivity (reflection loss) investigations of some carbon fibre samples with and without aluminium coating have been made. Results are interesting, in view of the anisotropy of the carbon fibre material. |
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582 |
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van't Klooster, C. G. M.; Parshin, V. V.; Myasnikova, S. E. |
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Reflectivity of antenna reflectors: measurements at frequencies between 110 and 200 GHz |
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Conference Article |
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2003 |
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Proc. Antennas and propagation society international symposium |
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3 |
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528-531 |
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mirror, reflection index, emissivity, reflectivity, mirror, Fabry-Perot interferometer, subterahertz, subTHz |
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Abstract |
It is imperative to test the mechanical, electrical and thermal-optical properties of MM and sub-MM reflector antennas. Electrical, thermal and optical properties are very important and high-accurate measurements lead, obviously, to more accurate results in applications. This paper deals with measurement of electrical reflectivity in the range 110-200 GHz. Reflectivity has been measured for a number of samples, which represent materials used in reflector antennas. Both metal samples and carbon-fibre samples were tested in a dedicated facility available for this purpose at the Applied Physics Institute in Nizhny Novgorod (IAP). The test facility is shortly discussed, with techniques for data extraction. Calibration is done with high quality silver coated mirrors and aluminium control samples. Accurate results have been derived with indicative interesting results. |
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583 |
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