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Dahl, H.; Metz, H. J.; Wriedt, T. |
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Title |
Light scattering of silver halide crystals |
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Conference Article |
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Year |
1998 |
Publication |
Proc. 3rd Workshop on Electromagnetic and Light Scattering |
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51-58 |
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Universität Bremen |
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504 |
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Author |
Bingham, S. J.; Börger, B.; Suter, D.; Thomson, A. J. |
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Title |
The design and sensitivity of microwave frequency optical heterodyne receivers |
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Journal Article |
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Year |
1998 |
Publication |
Review of Scientific Instruments |
Abbreviated Journal |
Rev. Sci. Instrum. |
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69 |
Issue |
9 |
Pages |
3403-3409 |
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Keywords |
optical mixing |
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0034-6748 |
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no |
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508 |
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Author |
Dieleman, Piter |
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Title |
Fundamental limitations of THz niobium and niobiumnitride SIS mixers |
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Book Whole |
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Year |
1998 |
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SIS |
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Ph.D. thesis |
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Rijksuniversiteit, Groningen |
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no |
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529 |
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Author |
Kawamura, Jonathan; Blundell, Raymond; Tong, C.-Y. Edward; Papa, D. Cosmo; Hunter, Todd R.; Gol'tsman, Gregory; Cherednichenko, Sergei; Voronov, Boris; Gershenzon, Eugene |
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Title |
First light with an 800 GHz phonon-cooled HEB mixer receiver |
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Conference Article |
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Year |
1998 |
Publication |
Proc. 9th Int. Symp. Space Terahertz Technol. |
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Proc. 9th Int. Symp. Space Terahertz Technol. |
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35-43 |
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Keywords |
HEB, mixer, LO power, local oscillator power, saturation effect, dynamic range |
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Abstract |
Phonon-cooled superconductive hot-electron bolometric (HEB) mixers are incorporated in a waveguide receiver designed to operate near 800 Gliz. The mixer elements are thin-film nio- bium nitride microbridges with dimensions of 4 nm thickness, 0.2 to 0.3 p.m in length and 2 jun in width. At 780 GHz the best receiver noise temperature is 840 K (DSB). The mixer IF bandwidth is 2.0 GHz, the absorbed LO power is —0.1 1.1W. A fixed-tuned version of the re- ceiver was installed at the Submillimeter Telescope Observatory on Mt. Graham, Arizona, to conduct astronomical observations. These observations represent the first time that a receiver incorporating any superconducting HEB mixer has been used to detect a spectral line of celes- tial origin. |
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Pasadena, California, USA |
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no |
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572 |
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Author |
Yagoubov, P.; Kroug, M.; Merkel, H.; Kollberg, E.; Gol'tsman, G.; Svechnikov, S.; Gershenzon, E. |
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Title |
Noise temperature and local oscillator power requirement of NbN phonon-cooled hot electron bolometric mixers at terahertz frequencies |
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Journal Article |
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Year |
1998 |
Publication |
Appl. Phys. Lett. |
Abbreviated Journal |
Appl. Phys. Lett. |
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Volume |
73 |
Issue |
19 |
Pages |
2814-2816 |
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Keywords |
NbN HEB mixers, noise temperature, local oscillator power |
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Abstract |
In this letter, the noise performance of NbN-based phonon-cooled hot electron bolometric quasioptical mixers is investigated in the 0.55–1.1 THz frequency range. The best results of the double-sideband <cd><2018>DSB<cd><2019> noise temperature are: 500 K at 640 GHz, 600 K at 750 GHz, 850 K at 910 GHz, and 1250 K at 1.1 THz. The water vapor in the signal path causes significant contribution to the measured receiver noise temperature around 1.1 THz. The devices are made from 3-nm-thick NbN film on high-resistivity Si and integrated with a planar spiral antenna on the same substrate. The in-plane dimensions of the bolometer strip are typically 0.2Ï«2 um. The amount of local oscillator power absorbed in the bolometer is less than 100 nW. |
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911 |
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