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Pan, S. K.; A. R. Kerr, M. W. Pospieszalski; Lauria, E. F.; Crady, W. K.; Horner, N.; Srikanth, Jr. S.; Bryerton, E.; Saini, K.; Claude, S. M. X.; Chin, C. C.; Dindo, P.; Rodrigues, G.; Derdall, D.; Zhang, J. Z.; Lichtenberger, A. W. |
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A fixed-tuned integrated SIS mixer with ultra-wideband IF and quantum-limited sensitivity for ALMA band 3 (84-116 GHz) receivers |
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2004 |
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Proc. 15th Int. Symp. Space Terahertz Technol. |
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55-61 |
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Northampton, MA |
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RPLAB @ s @ SIS_bandw_8GHz |
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358 |
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Hesler, Jeffrey L.; Hui, Kai; Crowe, Thomas W. |
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A fixed–tuned 400 GHz subharmonic mixer using planar Schottky diods |
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1999 |
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Proc. 10th Int. Symp. Space Terahertz Technol. |
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95 |
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Charlottesville, Virginia, USA |
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RPLAB @ s @ schottky_Tn_1120_at_0p42THz |
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291 |
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Schwaab, G. W.; Hübers, H.-W.; Schubert, J.; Erichsen, Patrik; Gol'tsman, G.; Semenov, A.; Verevkin, A.; Cherednichenko, S.; Gershenzon, E. |
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A high resolution spectrometer for the investigation of molecular structures in the THZ range |
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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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530-538 |
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antireflection coatings, dielectric mirrors |
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A status report on the design study of a novel tunable far-infrared (TuFTR) spectrometer for the investigation of the structure of weakly bound molecular complexes is given. The goal is a sensitive TuFIR spectrometer with full frequency coverage from 1-6 THz. To hit the goal, advanced sources (e.g. p-Ge lasers) and detectors (e.g. superconducting hot electron bolometric (HEB) mixers) shall be employed to extend the technique of cavity ringdown spectroscopy, that is currently used at optical and infrared frequencies to the FIR spectral range. Critical for such a system are high-Q resonators that still allow good optical coupling, and wideband antireflection coatings to increase detector sensitivity and decrease optical path losses. 2 nd order effective media theory and an iterative multilayer algorithm have been employed to design wideband antireflection coatings for dielectrics with large dielectric constants like Ge or Si. Taking into account 6 layers, for Si bandwidths of 100% of the center frequency could be obtained with power reflectivities below 1% for both polarizations simultaneously. Wideband dielectric mirrors including absorption losses were also studied yielding a bandwidth of about 50% with reflectivities larger than 99.5%. |
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1577 |
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Merkel, H.; Khosropanah, P.; Yagubov, P.; Kollberg, E. |
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A hot spot mixer model for superconducting phonone–cooled HEB far above the quasipartical band gap |
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1999 |
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Proc. 10th Int. Symp. Space Terahertz Technol. |
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592-606 |
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Charlottesville, Virginia |
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292 |
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Blundell, R.; Kawamura, J. H.; Tong, C. E.; Papa, D. C.; Hunter, T. R.; Gol’tsman, G. N.; Cherednichenko, S. I.; Voronov, B. M.; Gershenzon, E. M. |
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A hot-electron bolometer mixer receiver for the 680-830 GHz frequency range |
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1998 |
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Proc. 6-th Int. Conf. Terahertz Electron. |
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Proc. 6-th Int. Conf. Terahertz Electron. |
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18-20 |
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NbN HEB mixers |
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We describe a heterodyne receiver designed to operate in the partially transparent atmospheric windows centered on 680 and 830 GHz. The receiver incorporates a niobium nitride thin film, cooled to 4.2 K, as the phonon-cooled hot-electron mixer element. The double sideband receiver noise, measured over the frequency range 680-830 GHz, is typically 700-1300 K. The instantaneous output bandwidth of the receiver is 600 MHz. This receiver has recently been used at the SubMillimeter Telescope, jointly operated by the Steward Observatory and the Max Planck Institute for Radioastronomy, for observations of the neutral carbon and CO spectral lines at 810 GHz and at 806 and 691 GHz respectively. Laboratory measurements on a second mixer in the same test receiver have yielded extended high frequency performance to 1 THz. |
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Leeds, UK |
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IEEE |
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0-7803-4903-2 |
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IEEE Sixth International Conference on Terahertz Electronics Proceedings. THZ 98. (Cat. No.98EX171) |
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1581 |
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