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Author Mohan, Nishant; Minaeva, Olga; Goltsman, Gregory N.; Saleh, Mohammed F.; Nasr, Magued B.; Sergienko, Alexander V.; Saleh, Bahaa E.; Teich, Malvin C. url  doi
openurl 
  Title Ultrabroadband coherence-domain imaging using parametric downconversion and superconducting single-photon detectors at 1064 nm Type Journal Article
  Year 2009 Publication Appl. Opt. Abbreviated Journal (down) Appl. Opt.  
  Volume 48 Issue 20 Pages 4009–4017  
  Keywords SSPD, SNSPD, SPAD  
  Abstract Coherence-domain imaging systems can be operated in a single-photon-counting mode, offering low detector noise; this in turn leads to increased sensitivity for weak light sources and weakly reflecting samples. We have demonstrated that excellent axial resolution can be obtained in a photon-counting coherence-domain imaging (CDI) system that uses light generated via spontaneous parametric downconversion (SPDC) in a chirped periodically poled stoichiometric lithium tantalate (chirped-PPSLT) structure, in conjunction with a niobium nitride superconducting single-photon detector (SSPD). The bandwidth of the light generated via SPDC, as well as the bandwidth over which the SSPD is sensitive, can extend over a wavelength region that stretches from 700 to 1500 nm. This ultrabroad wavelength band offers a near-ideal combination of deep penetration and ultrahigh axial resolution for the imaging of biological tissue. The generation of SPDC light of adjustable bandwidth in the vicinity of 1064 nm, via the use of chirped-PPSLT structures, had not been previously achieved. To demonstrate the usefulness of this technique, we construct images for a hierarchy of samples of increasing complexity: a mirror, a nitrocellulose membrane, and a biological sample comprising onion-skin cells.  
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  Notes Approved no  
  Call Number RPLAB @ gujma @ Serial 652  
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Author Lieberzeit, Peter A.; Dickert, Franz L. url  doi
openurl 
  Title Chemosensors in environmental monitoring: challenges in ruggedness and selectivity Type Journal Article
  Year 2009 Publication Analytical and Bioanalytical Chemistry Abbreviated Journal (down) Anal Bioanal Chem  
  Volume 393 Issue 2 Pages 467-472  
  Keywords environmental monitoring, in situ sensing, artificial recognition materials, real-life application, molecular imprinting, QCM  
  Abstract Environmental analysis is a potential key application for chemical sensors owing to their inherent ability to detect analytes on-line and in real time in distributed systems. Operating a chemosensor in a natural environment poses substantial challenges in terms of ruggedness, long-term stability and calibration. This article highlights current trends of achieving both the necessary selectivity and ruggedness: one way is deploying sensor arrays consisting of robust broadband sensors and extracting information via chemometrics. If using only a single sensor is desired, molecularly imprinted polymers offer a straightforward way for designing artificial recognition materials. Molecularly imprinted polymers can be utilized in real-life environments, such as water and air, aiming at detecting analytes ranging from small molecules to entire cells.  
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  ISSN 1618-2642 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number Serial 564  
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Author Bharadwaj, Palash; Deutsch, Bradley; Novotny, Lukas openurl 
  Title Optical Antennas Type Journal Article
  Year 2009 Publication Advances in Optics and Photonics Abbreviated Journal (down) Adv. Opt. Photon  
  Volume 1 Issue Pages 438-483  
  Keywords optical antennas  
  Abstract Optical antennas are an emerging concept in physical optics. Similar to radiowave

and microwave antennas, their purpose is to convert the energy of free propagating radiation to localized energy, and vice versa. Optical antennas exploit the unique properties of metal nanostructures, which behave as strongly coupled plasmas at ptical frequencies. The tutorial provides an account of the historical origins and the basic concepts and parameters associated with optical antennas. It also reviews recent work in the field and discusses areas of application, such as light-emitting devices, photovoltaics, and spectroscopy.		  
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  Notes Approved no  
  Call Number RPLAB @ gujma @ Serial 754  
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Author Goltsman, G. url  openurl
  Title Superconducting NbN hot-electron bolometer mixer, direct detector and single-photon counter: from devices to systems Type Report
  Year 2009 Publication 2-nd Int. Conf. EUROFLUX Abbreviated Journal (down) 2-nd Int. Conf. EUROFLUX  
  Volume Issue Pages  
  Keywords HEB, SSPD, SNSPD  
  Abstract  
  Address Avignon, France  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
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  Notes Provided by the SAO/NASA Astrophysics Data System Approved no  
  Call Number Serial 1398  
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Author Treuttel, J.; Thomas, B.; Maestrini, A.; Wang, H.; Alderman, B.; Siles, J.V.; Davis, S.; Narhi, T. openurl 
  Title A 380 GHz sub-harmonic mixer using MMIC foundry based Schottky diodes transferred onto quartz substrate Type Conference Article
  Year 2009 Publication Proc. 20th Int. Symp. Space Terahertz Technol. Abbreviated Journal (down)  
  Volume Issue Pages  
  Keywords Schottky  
  Abstract  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Charlottesville, Virginia, USA Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
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  ISSN ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number Serial 586  
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Author Meledin, Denis; Pavolotsky, Alexey; Desmaris, Vincent.; Lapkin, Igor; Risacher, Christophe; Perez, Victor; Henke, Douglas; Nystrom, Olle; Sundin, Erik; Dochev, Dimitar; Pantaleev, Miroslav; Fredrixon, Mathias; Strandberg, Magnus; Voronov, Boris; Goltsman, Gregory; Belitsky, Victor url  doi
openurl 
  Title A 1.3-THz balanced waveguide HEB mixer for the APEX telescope Type Journal Article
  Year 2009 Publication IEEE Trans. Microw. Theory Techn. Abbreviated Journal (down)  
  Volume 57 Issue 1 Pages 89-98  
  Keywords HEB, mixer, waveguide, balanced, NbN  
  Abstract In this paper, we report about the development, fabrication, and characterization of a balanced waveguide hot electron bolometer (HEB) receiver for the Atacama Pathfinder EXperiment telescope covering the frequency band of 1.25–1.39 THz. The receiver uses a quadrature balanced scheme and two HEB mixers, fabricated from 4- to 5-nm-thick NbN film deposited on crystalline quartz substrate with an MgO buffer layer in between. We employed a novel micromachining method to produce all-metal waveguide parts at submicrometer accuracy (the main-mode waveguide dimensions are 90×180 μm). We present details on the mixer design and measurement results, including receiver noise performance, stability and “first-light” at the telescope site. The receiver yields a double-sideband noise temperature averaged over the RF band below 1200 K, and outstanding stability with a spectroscopic Allan time more than 200 s.  
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  ISSN 0018-9480 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number RPLAB @ lobanovyury @ Serial 554  
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Author Минаева, Ольга Вячеславовна pdf  openurl
  Title Быстродействующий однофотонный детектор на основе тонкой сверхпроводниковой пленки NbN Type Manuscript
  Year 2009 Publication М. МПГУ Abbreviated Journal (down)  
  Volume Issue Pages  
  Keywords SSPD  
  Abstract  
  Address  
  Corporate Author Thesis Ph.D. thesis  
  Publisher Place of Publication Editor  
  Language russian Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number Serial 585  
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Author Рябчун, С. А. pdf  openurl
  Title Широкополосные высокостабильные терагерцовые смесители на горячих электронах из тонких сверхпроводниковых пленок NbN Type Manuscript
  Year 2009 Publication М. МПГУ Abbreviated Journal (down)  
  Volume Issue Pages 98  
  Keywords HEB, mixer, terahertz, THz, stability, Allan variance, conversion bandwidth, in-situ technique, Au contacts  
  Abstract  
  Address  
  Corporate Author Thesis Ph.D. thesis  
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  Series Editor Series Title Abbreviated Series Title  
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  ISSN ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number Serial 598  
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Author Ryabchun, S. A.; Tretyakov, I. V.; Pentin, I. V.; Kaurova, N. S.; Seleznev, V. A.; Voronov, B. M.; Finkel, M. I.; Maslennikov, S. N.; Gol'tsman, G. N. doi  openurl
  Title Low-noise wide-band hot-electron bolometer mixer based on an NbN film Type Journal Article
  Year 2009 Publication Radiophys. Quant. Electron. Abbreviated Journal (down)  
  Volume 52 Issue 8 Pages 576-582  
  Keywords HEB mixer, in-situ contacts, noise temperature, conversion gain bandwidth, diffusion cooling channel  
  Abstract We develop and study a hot-electron bolometer mixer made of a two-layer NbN–Au film in situ deposited on a silicon substrate. The double-sideband noise temperature of the mixer is 750 K at a frequency of 2.5 THz. The conversion efficiency measurements show that at the superconducting transition temperature, the intermediate-frequency bandwidth amounts to about 6.5 GHz for a mixer 0.112 μm long. These record-breaking characteristics are attributed to the improved contacts between a sensitive element and a helical antenna and are reached due to using the in situ deposition of NbN and Au layers at certain stages of the process.  
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  Notes Approved no  
  Call Number Serial 599  
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Author Рябчун, С. А.; Третьяков, И. В.; Пентин, И. В; Каурова, Н. С.; Селезнев, В. А; Воронов, Б. М.; Финкель, М. И.; Масленников, С. Н.; Гольцман, Г. Н. openurl 
  Title Малошумящий широкополосный терагерцовый смеситель на эффекте электронного разогрева в плёнке NbN Type Journal Article
  Year 2009 Publication Известия высших учебных заведений. Радиофизика Abbreviated Journal (down)  
  Volume 52 Issue 8 Pages 641-648  
  Keywords HEB mixer, in-situ contacts, noise temperature, conversion gain bandwidth, diffusion cooling channel  
  Abstract Разработан и исследован смеситель на горячих электронах, изготовленный из двуслойной плёнки NbN-Au, осаждённой на кремневую подложку in situ. Двухполосная шумовая температура устройства составила 750 К на частоте 2.5 ТГц. Измерения эффективности преобразования для смесителя длиной 0.112 мкм вблизи температуры сверхпроводящего перехода показали полосу промежуточных частот около 6.5 ГГц. Эти результаты являются рекордными и были получены за счёт улучшения контактов между чувствительным элементом и спиральной антенной при замене технологического маршрута с нанесением слоёв NbN и Au в отдельных процессах на технологический процесс, в котором данные слои наносятся in situ без нарушения вакуума.  
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  ISSN ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number Serial 600  
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