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Author Boreman, Glenn D.
Title Infrared microantennas Type Journal Article
Year 1997 Publication (down) SPIE Abbreviated Journal SPIE
Volume 3110 Issue Pages 882-885
Keywords optical antennas
Abstract We present results of mesurments of the polarization response of asymetric spiral antennas coupled Ni-NiO-Ni diodes, over the wavelength range 10.2 to 10.7 μm. The feed structure of the antenna imposes an elliptical polarization singature that is different from the circular polarization expected from a symmetric spiral. We develop a lossy-transmission-line model yielding the measured polarization response. A combination of a balanced and an unbalanced mode is required. Reflected current waves from the arm ends are significant.
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Call Number RPLAB @ gujma @ Serial 755
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Author Genack, Azriel Z.; Kopp, Victor I.; Churikov, Victor M.; Singer, Jonathan; Chao, Norman; Neugroschl, Daniel A.
Title Chiral fiber Bragg gratings Type Conference Article
Year 2004 Publication (down) Proceedings of the SPIE Abbreviated Journal Proc. SPIE
Volume 5508 Issue Pages 57-64
Keywords optical fiber gratings, chiral fiber gratings, chiral gratings, from chiralphotonics
Abstract We have produced chiral fiber Bragg gratings with double-helix symmetry and measured the polarization and wavelength selective transmission properties of these structures. These gratings interact only with circularly polarized light with the same handedness as the grating twist and freely transmit light of the orthogonal polarization. The optical characteristics of chiral fibers are compared to those of planar cholesteric structures. The resonant standing wave at the band edge or at a defect state within the band gap, as well as the evanescent wave within the band gap is comprised of two counterpropagating components of equal amplitude. The electric field vector of such a circularly polarized standing wave does not rotate in time; rather it is linearly polarized in any given plane. The standing wave may be described in terms of the sense of circular polarization of the two counterpropagating components. The wavelength dependence of the angle q between the linearly polarized electromagnetic field and the extraordinary axis, which is constant throughout a long structure, is obtained in a simple calculation. The results are in good agreement with scattering matrix calculations. Resonant chiral gratings are demonstrated for microwave radiation whereas chiral gratings with pitch exceeding the wavelength are demonstrated at optical wavelengths in single-mode glass fibers. The different functionalities of these fibers are discussed.
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Call Number Serial 854
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Author Brown, Robert. L.
Title Technical specification of the Millimeter Array Type Conference Article
Year 1998 Publication (down) Proc. SPIE, Advanced Technology MMW, Radio, and Terahertz Telescopes, vol. 3357 Abbreviated Journal
Volume Issue Pages 231-237
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Publisher Place of Publication Editor Phillips, Thomas G.
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Call Number RPLAB @ s @ ALMA_tech Serial 287
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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 (down) Proc. SPIE Abbreviated Journal
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Call Number Serial 421
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Author Thijs de Graauw; Nick Whyborn; Frank Helmich; Pieter Dieleman; Peter Roelfsema; Emmanuel Caux; Tom Phillips; Jürgen Stutzki; Douwe Beintema; Arnold Benz; Nicolas Biver; Adwin Boogert; Francois Boulanger; Sergey Cherednichenko; Odile Coeur-Joly; Claudia Comito; Emmanuel Dartois; Albrecht de Jonge; Gert de Lange; Ian Delorme; Anna DiGiorgio; Luc Dubbeldam; Kevin Edwards; Michael Fich; Rolf Güsten; Fabrice Herpin; Netty Honingh; Robert Huisman; Herman Jacobs; Willem Jellema; Jon Kawamura; Do Kester; Teun Klapwijk; Thomas Klein; Jacob Kooi; Jean-Michel Krieg; Carsten Kramer; Bob Kruizenga; Wouter Laauwen; Bengt Larsson; Christian Leinz; Rene Liseau; Steve Lord; Willem Luinge; Anthony Marston; Harald Merkel; Rafael Moreno; Patrick Morris; Anthony Murphy; Albert Naber; Pere Planesas; Jesus Martin-Pintado; Micheal Olberg; Piotr Orleanski; Volker Ossenkopf; John Pearson; Michel Perault; Sabine Phillip; Mirek Rataj; Laurent Ravera; Paolo Saraceno; Rudolf Schieder; Frank Schmuelling; Ryszard Szczerba; Russell Shipman; David Teyssier; Charlotte Vastel; Huib Visser; Klaas Wildeman; Kees Wafelbakker; John Ward; Roonan Higgins; Henri Aarts; Xander Tielens; Peer Zaal
Title The Herschel-heterodyne instrument for the far-infrared (HIFI): instrument and pre-launch testing Type Conference Article
Year 2008 Publication (down) Proc. SPIE Abbreviated Journal
Volume 7010 Issue Pages 701004
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Call Number Serial 422
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