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Displaying 626 - 650 of 1184

An Optical Fiber-Based Source of Polarization-Entangled Photon Pairs

September 10, 2007
Author(s)
Jingyun Fan, M D. Eisaman, Alan L. Migdall
… a polarization-entangled two-photon coincidence rate of 7 kHz per 0.5 THz (0.9 nm) of bandwidth per 300 ?W of average … that this source possesses a high spectral brightness (7 kHz/300 ?W/0.9 nm), large tunable wavelength range (24 nm), …

Refrigeration for Superconductors

September 20, 2004
Author(s)
Ray Radebaugh
… Temperatures in the range of 0.05 to 80 K are required for most applications of …

Large Area Pt/n-GaN Schottky Photodiodes With Extremely Low Leakage Current

August 19, 2004
Author(s)
A Shahid, Robert E. Vest, D Franz, F Yan, Y Zhao, D B. Mott
Pt/n-type GaN Schottky photodiodes with very large active areas (0.25 cm 2 and 1 cmu2 ) which exhibit extremely low leakage currents at low reverse bias are reported. The Schottky photodiodes were fabricated from n-/n+ epitaxial layers grown by low

Influence of Grain Size on the Tensile Creep Behavior of Ytterbium-Containing Silicon Nitride

March 1, 2004
Author(s)
Sheldon M. Wiederhorn, A R D Lopez, William E. Luecke, Michael J. Hoffmann, B Hockey, J French, D C. Yoon
The effect of grain size on the tensile creep of silicon nitride is investigated on two materials, one containing 5 % by volume Yb2O3, the other containing 5 % by volume Yb203 and 0.5 % by mass Al2O3. Annealing of the alumina-free silicon nitride increased

Simulation of Cup-Burner Flames in Microgravity

June 1, 2003
Author(s)
V Katta, F Takahashi, Gregory T. Linteris
The extinction process of cup-burner flames under normal-gravity conditions were previously studied. As the low-speed diffusion flames behave differently in microgravity compared to those on earth, it is important to understand the structureof cup-burner

Noise Temperature for Nb DHEB Mixer Receiver for Far-Infrared Spectroscopy

September 1, 2002
Author(s)
Eyal Gerecht, Carl D. Reintsema, Erich N. Grossman, A. L. Betz, R. T. Boreiko
We are reporting a noise temperature measured on a diffusion-cooled hot electron bolometeric (DHEB) mixer designed for a heterodyne focal plane array to study lines with frequencies of 2 THz and above. Our fabrication process utilizes selective ion milling

Synchrotron White-Beam X-Ray Topography of Ribonuclease S Crystals

April 1, 2002
Author(s)
W M. Vetter, David Travis Gallagher, M Dudley
With careful experimental design indexed synchrotron white-beam X-ray topographs of ribonuclease S crystals at ambient temperature could be recorded with a definition and contrast comparable to that of monochromatic beam topographs of other proteins

Characterization of UV Detectors at SURF III (invited)

March 1, 2002
Author(s)
Ping-Shine Shaw, Thomas C. Larason, R Gupta, Keith R. Lykke
The Synchrotron Ultraviolet Radiation Facility (SURF III) at the National Institute of Standards and Technology provides a unique research opportunity in precision measurement with its continuous and calculable radiation stretching from the soft x-ray to

The Ternary Eutectic of Sn-Ag-Cu Solder Alloys

September 1, 2000
Author(s)
Kil-Won Moon, William J. Boettinger, Ursula R. Kattner, Frank S. Biancaniello, C A. Handwerker
… is located at a composition of (3.57 plus or minus 0.05) mass % Ag and (0.9 plus or minus 0.04) mass % Cu at a …
Displaying 626 - 650 of 1184
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