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Displaying records 51 to 60 of 272 records.
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51. Development of an infrared optical scattering instrument from 1 um to 5 um
Topic: Physics
Published: 10/1/2009
Authors: Jinan Zeng, Leonard M Hanssen
Abstract: The wavelength coverage of the IR optical scattering instrument developed at the National Institute of Standards and Technology has been extended to cover the continuous range from 1 um to 5 um. Besides the previously available diode lasers at wavele ...

52. Development of in-situ calibration method for current-to-voltage converters for high-accuracy SI-traceable low-DC-current measurements
Topic: Physics
Published: 9/20/2013
Authors: George P Eppeldauer, Howard W Yoon, Dean G Jarrett, Thomas C Larason
Abstract: For photocurrent measurements with low uncertainties, wide-dynamic range reference current-to-voltage converters and a new converter calibration method have been developed at the National Institute of Standards and Technology (NIST). The high feedba ...

53. Dimensional Analysis of Through Silicon Vias Using the TSOM Method
Topic: Physics
Published: 7/12/2011
Authors: Ravikiran Attota, Andrew Rudack
Abstract: There is a great need for accurate, truly-3D metrology solutions that can be used for analysis of high aspect ratio features such as through-silicon-vias (TSVs). Through-focus scanning optical microscopy (TSOM) is an optical metrology method that pr ...

54. Dipole Moment of a Pb-O Vacancy Pair in PbTiO^d3^
Topic: Physics
Published: 4/1/2004
Authors: Eric J Cockayne, Benjamin P Burton
Abstract: The polarization of a nearest-neighbor (nn) Pb-O vacancy pair in PbTiO3 is calculated, using the modern theory of polarization, implemented in the density functional theory ultrasoft pseudopotential formalism. The dipole moment per divacancy is about ...

55. Dual-polarization-sensitive kinetic inductance detectors for balloon-borne, sub-millimeter polarimetry
Topic: Physics
Published: 3/20/2014
Authors: James A Beall, Daniel Thomas Becker, Justus A Brevik, Hsiao-Mei Cho, Gene C Hilton, Kent D Irwin, Dale Li, David P Pappas, Jeffrey Lee Van Lanen, Johannes Hubmayr
Abstract: We are developing arrays of kinetic inductance detectors for sub-millimeter polarimetry that will be deployed on the BLAST balloon-borne instrument. The array is feedhorn-coupled, and each pixel contains two lumped-element kinetic inductance dete ...

56. EUV-Driven Carbonaceous Film Deposition and Its Photo-oxidation on a TiO2 Film Surface
Topic: Physics
Published: 9/23/2013
Authors: Nadir S. Faradzhev, Monica McEntee, John Yate, Shannon Bradley Hill, Thomas B Lucatorto
Abstract: We report the photo-deposition of a carbonaceous layer grown on a TiO2 thin film by EUV radiation-induced chemistry of adsorbed n-tetradecane and the subsequent photo-oxidation of this film. It is found by chemical analysis of the C layer that irradi ...

57. Effect of Surface Modes on Photon Propagation through Dielectric Bandgaps
Topic: Physics
Published: 10/28/2009
Authors: Natalia Malkova, Sergey V Polyakov, Alan L Migdall, Garnett W Bryant
Abstract: We investigate the Hartman saturation effect of photons traveling through barriers created by bandgaps of multilayer stacks. In particular, we investigate theoretically the recently observed jumps in photon transversal times due to adding a single l ...

58. Effect of interactions on edge property measurements in magnetic multilayers
Topic: Physics
Published: 2/25/2011
Authors: Meng Zhu, Robert D McMichael
Abstract: This paper reports effects of inter-film interactions on static and dynamic magnetization behavior at film edges in magnetic trilayer stripe arrays under transverse applied fields. The trilayers consist of two magnetic films of Ni80Fe20, 10 nm and 2 ...

59. Effect of metal/substrate interfaces on radio-frequency loss in superconducting coplanar waveguides
Topic: Physics
Published: 11/8/2010
Authors: David S. Wisbey, Jiansong Gao, Fabio Cesar Da Silva, Jeffrey S. Kline, Michael R Vissers, David P Pappas, Leila R Vale
Abstract: Microscopic two-level systems (TLSs) are known to contribute to loss in resonant superconducting microwave circuits. This loss increases at low power and temperatures as the TLSs become unsaturated. We find that the loss is dependent on both the subs ...

60. Effect of strain, magnetic field and field angle on the critical current density of YBa^d2^Cu^d3^O^d7-{delta}^ coated conductors
Topic: Physics
Published: 5/18/2010
Authors: Daniel Cornelis van der Laan, J. F. Douglas, John (Jack) Ekin, Loren Frederick Goodrich, Theodore C Stauffer, Cameron C. Clickner
Abstract: A large, magnetic-field-dependent, reversible reduction in critical current density with axial strain in YBa^d2^Cu^d3^O^d7-{delta}^ coated conductors at 75.9 K has been measured. This effect may have important implications for the performance of YBa ...

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