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Author Gol'tsman, G.; Maslennikov, S.; Finkel, M.; Antipov, S.; Kaurova, N.; Grishina, E.; Polyakov, S.; Vachtomin, Y.; Svechnikov, S.; Smirnov, K.; Voronov, B.
Title Nanostructured ultrathin NbN film as a terahertz hot-electron bolometer mixer Type Conference Article
Year 2006 Publication (up) Proc. MRS Abbreviated Journal Proc. MRS
Volume 935 Issue Pages 210 (1 to 6)
Keywords NbN HEB mixers
Abstract Planar spiral antenna coupled and directly lens coupled NbN HEB mixer structures are studied. An additional MgO buffer layer between the superconducting film and Si substrate is introduced. The buffer layer enables us to increase the gain bandwidth of a HEB mixer due to better acoustic transparency. The gain bandwidth is widened as NbN film thickness decreases and amounts to 5.2 GHz. The noise temperature of antenna coupled mixer is 1300 and 3100 K at 2.5 and 3.8 THz respectively. The structure and composition of NbN films is investigated by X-ray diffraction spectroscopy methods. Noise performance degradation at LO frequencies more than 3 THz is due to the use of a planar antenna and signal loss in contacts between the antenna and the sensitive NbN bridge. The mixer is reconfigured for operation at higher frequencies in a manner that receiver’s noise temperature is only 2300 K (3 times of quantum limit) at LO frequency of 30 THz.
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ISSN 0272-9172 ISBN Medium
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Notes Approved no
Call Number Serial 1440
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Author de Graauw, Thijs; Whyborn, Nick; Caux, Emmanuel; Phillips, Tom; Stutzki, Juergen; Tielens, Xander; Güsten, Rolf; Helmich, Frank; Luinge, W.; Pearson, John; Roelfsema, Peter; Schieder, Rudolf; Wildeman, Klaas; Wafelbakker, Kees
Title The Herschel-heterodyne instrument for the far-infrared (HIFI) Type Conference Article
Year 2006 Publication (up) Proc. SPIE Abbreviated Journal
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Publisher Place of Publication Orlando Editor
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Notes Approved no
Call Number Serial 421
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Author David Olaya; Jian Wei; Sergei Pereverzev; Karasik, Boris S.; Kawamura, Jonat.han H.; McGrath, William R.; Sergeyev, Andrei V.; Gershenson, Michael E.
Title An ultrasensitive hot-electron bolometer for low-background SMM applications Type Conference Article
Year 2006 Publication (up) Proc. SPIE Abbreviated Journal
Volume 6275 Issue Pages 627506
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Notes Approved no
Call Number RPLAB @ s @ qoheb_det_SPIE_Olaya_2006 Serial 387
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Author Piotr슠Orleanski; Miroslaw슠Ciechanowicz; Malgorzata슠Michalska; Witold슠Nowosielski; Miroslaw슠Rataj; Marek슠Winkler
Title LCU: the control unit dedicated for local oscillator subsystem in ESA HIFI/Herschel project Type Conference Article
Year 2006 Publication (up) Proc. SPIE Abbreviated Journal
Volume 6159 Issue Pages
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Notes Approved no
Call Number RPLAB @ s @ LO_control_HIFI_Heschel_2006 Serial 391
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Author Karpov, A.; Miller, D.; Rice, F.; Stern, J. A.; Bumble, B.; LeDuc, H. G.; Zmuidzinas, J.
Title Development of 1.25 THz SIS mixer for Herschel Space Observatory Type Conference Article
Year 2006 Publication (up) Proc. SPIE Abbreviated Journal
Volume 6275 Issue Pages 62751
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Publisher Place of Publication Editor Zmuidzinas, Jonas; Holland, Wayne S.
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Notes Approved no
Call Number RPLAB @ s @ Karpov_SIS_2006 Serial 401
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