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Author Kenyon, M.; Day, P. K.; Bradford, C. M.; Bock, J. J.; Leduc, H. G.
Title (down) Background-limited membrane-isolated TES bolometers for far-IR/submillimeter direct-detection spectroscopy Type Journal Article
Year 2006 Publication Nucl. Instr. & Meth. Phys. Res. A Abbreviated Journal
Volume 559 Issue Pages 456-458
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Call Number RPLAB @ s @ TES_NEP_1e_19 Serial 384
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Author Skalare, A.; McGrath, William R.; Echternach, P. M.; Leduc, H. G.; Siddiqi, I.; Verevkin, A.; Prober, D. E.
Title (down) Aluminum hot-electron bolometer mixers at submillimeter wavelengths Type Journal Article
Year 2001 Publication IEEE Trans. Appl. Supercond. Abbreviated Journal
Volume 11 Issue 1 Pages 641-644
Keywords Al HEB mixer, contacts, interface, in situ, in-situ, Aluminium HEB mixer
Abstract Diffusion-cooled aluminum hot-electron bolometer (HEB) mixers are of interest for low-noise high resolution THz-frequency spectroscopy within astrophysics. Al HEB mixers offer operation with an order of magnitude less local oscillator power, higher intermediate frequency bandwidth and potentially lower noise than competing devices made from other materials. We report on mixer experiments at 618 GHz with devices fabricated from films with sheet resistances in the range from about 55 Ω down to about 9 Ω per square. Intermediate frequency bandwidths of up to 3 GHz were measured (1 μm long device), with absorbed local oscillator power levels of 0.5 to 6 nW and mixer conversion up to -21.5 dB. High input coupling efficiency implies that the electrons in the device are able to thermalize before escaping from the device. It was found that the long coherence length complicates mixer operations due to the proximity of the contact pads. Also, saturation at the IF frequency may be a concern for this type of device, and warrants further studies.
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ISSN 1051-8223 ISBN Medium
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Call Number ref919426b Serial 1061
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Author Chattopadhyay, G.; Rice, F.; Miller, D.; LeDuc, H. G.; Zmuidzinas, J.
Title (down) A 530-GHz balanced mixer Type Journal Article
Year 1999 Publication IEEE Microw. and Guided Wave Lett. Abbreviated Journal
Volume 9 Issue 11 Pages 467-469
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Call Number RPLAB @ s @ sis_Chattopadhyay_1999 Serial 301
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