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Displaying records 41 to 50 of 274 records.
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41. Large-area irradiance-mode spectral response measurements of solar cells by a light-emitting-diode- based integrating sphere source
Topic: Physics
Published: 5/30/2014
Authors: Behrang H Hamadani, John F Roller, Andrew M. Shore, Brian P Dougherty, Howard W Yoon
Abstract: An irradiance-mode absolute differential spectral response measurement system based on a light emitting diode (LED) array is described. The LEDs are coupled to an integrating sphere whose output irradiance is uniform to better than 2 % over an ar ...

42. NIST traceable measurements of radiance and luminance levels of night-vision-goggle test-instruments
Topic: Physics
Published: 5/7/2014
Authors: George P Eppeldauer, Vyacheslav B Podobedov
Abstract: In order to perform radiance and luminance level measurements of night-vision-goggle (NVG) test instruments, NIST developed new-generation transfer-standard radiometers (TR). The new TRs can perform low-level radiance and luminance measurements with ...

43. Time-resolved double-slit interference pattern measurement with entangled photons
Topic: Physics
Published: 4/28/2014
Authors: Lynden Krister Shalm, Thomas Jennewein, Kevin Resch, Piotr Kolenderski, Carmelo Scarcella, Kelsey D. Johnsen Johnsen, Deny Hamel, Cahterine Holloway, Simone Tisa, Alberto Tosi
Abstract: The double-slit experiment strikingly demonstrates the wave-particle duality of quantum objects. In this famous experiment, particles pass one-by-one through a pair of slits and are detected on a distant screen. A distinct wave-like pattern emerg ...

44. Preparation of nanocomposite plasmonic films made from cellulose nanocrystals or mesoporous silica decorated with unidirectionally aligned gold nanorods
Topic: Physics
Published: 4/11/2014
Authors: Michael Campbell, Qingkun Liu, Aric Warner Sanders, Julian Evans, Ivan I. Smalyukh
Abstract: Using liquid crystalline self-assembly of cellulose nanocrystals, we achieve long-range alignment of anisotropic metal nanoparticles in colloidal nanocrystal dispersions that are then used to deposit thin structured films with ordering features h ...

45. 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 ...

46. Head and Media Challenges for 3 Tb/in^u2^ Microwave Assisted Magnetic Recording
Topic: Physics
Published: 2/3/2014
Authors: Thomas J Silva, Justin M Shaw, Hans Toya Nembach, Mike Mallary, Kumar Srinivasan, Gerado Bertero, Dan Wolf, Christian Kaiser, Michael Chaplin, Mahendra Pakala, Leng Qunwen, Yiming Wang, Carl Elliot, Lui Francis
Abstract: A specific design for Microwave Assisted Magnetic Recording (MAMR) at about 3Tb/in^u2^ (0.47 Tb/cm^u2^ or 4.7 Pb/m^u2^) is discussed in detail to highlight the challenges of MAMR and to contrast its requirements with conventional Perpendicular Magnet ...

47. Time Measurement
Topic: Physics
Published: 2/3/2014
Author: Michael A Lombardi
Abstract: An overview of time metrology, with emphasis on time interval measurements, and time synchronization. It covers the evolution of clocks and timekeeping, time scales, the fundamentals of time measurement, and the various time transfer technique used ...

48. Quantum teleportation from a telecom-wavelength photon to a solid-state quantum memory
Topic: Physics
Published: 1/28/2014
Authors: Felix Bussieres, Christoph Clausen, Alexey Tiranov, Boris Korzh, Varun Boehm Verma, Sae Woo Nam, Francesco Marsili, Alban Ferrier, Harald Hermann, Christine Silberhorn, Wolfgang Sohler, Mikael Afzelius, Nicolas Gisin
Abstract: In quantum teleportation [1], the state of a single quantum system is disembodied into classical information and purely quantum correlations, to be later reconstructed onto a second system that has never directly interacted with the first one. ...

49. Absorptions Between 3000 and 5500 cm-1 of cyclic O4+ and O4- Trapped in Solid Neon
Topic: Physics
Published: 12/19/2013
Authors: Marilyn E Jacox, Warren Elwin Thompson
Abstract: Recently, gas-phase absorptions in the 3000 to 4300 cm-1 spectral region have been assigned to combination bands built on (v1 + v5) of ground-state cyc-O4+. Other gas-phase experiments identified an electronic transition of cyc-O4- complexed with an ...

50. Measuring the Neutron Lifetime with Magnetically Trapped Ultracold Neutrons
Topic: Physics
Published: 12/16/2013
Author: Hans P Mumm
Abstract: We describe an experiment to measure the neutron lifetime using a technique with a set of systematic uncertainties largely different than those of previous measurements. In this approach, UCN are produced by inelastic scattering of cold (0.89 nm) ne ...

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