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NIST Authors in Bold

Displaying 501 - 525 of 1413

A four-pixel single-photon pulse-position array fabricated from WSi superconducting nanowire single- photon detectors

February 3, 2014
Author(s)
Varun B. Verma, Robert D. Horansky, Francesco Marsili, Jeffrey Stern, Matthew Shaw, Adriana E. Lita, Richard P. Mirin, Sae Woo Nam
We demonstrate a scalable readout scheme for an infrared single-photon pulse-position camera consisting of WSi superconducting nanowire single-photon detectors. For an N × N array, only 2 × N wires are required to obtain the position of a detection event

Analysis for Dynamic Metrology

January 30, 2014
Author(s)
Andrew M. Dienstfrey, Paul D. Hale
Diverse measurement contexts require estimates of time varying quantities. Ideally the measurement device responds to signal variations significantly more rapidly than the modulation of the signal itself. If so, then well-developed techniques may be used

Greedy Backpressure Routing for Smart Grid Sensor Networks

January 13, 2014
Author(s)
Hamid Gharavi
In this paper, a greedy backpressure routing protocol is proposed for multigate mesh networks. This protocol evaluates the greedy backpressure metric (GBM) value of mesh points and routes packets in the direction of the steepest gradient. The GBM value is

10 TOhm and 100 TOhm High Resistance Measurements at NIST

September 25, 2013
Author(s)
Dean G. Jarrett, Marlin E. Kraft
The measurement techniques, standards, and bridges used to calibrate standard resistors in the 10 TΩ to 100TΩ range at NIST are described. Standard resistors, guarded Hamon transfer standard, and 10:1 and 100:1 bridge ratios, were used to provide multiple

On the Link Between Insertion Loss and Lower Bound of Efficiency

August 9, 2013
Author(s)
Levon Barsikyan, Jason Coder, Mark Golkowski, John M. Ladbury
We investigate the effect of chamber loss on the recently developed 2-port antenna model and the associated method of determining antenna efficiency. The loss in the reverberation chamber was controlled using microwave absorbing foam creating four

Hybrid quantum-well system for wavelength-channel selection

June 28, 2013
Author(s)
Lu Deng, Edward W. Hagley, Chengjie Zhu
We consider a hybrid quantum-well structure consisting of regions whose properties alternate between active Raman gain and electromagnetically induced transparency. We present both analytical and numerical results that indicate a large light beam defection

Traceability for Aerosol Electrometer in the fA Range

June 1, 2013
Author(s)
Dean G. Jarrett, Miles Owen
Described here are the configurations and procedures used to provide traceability to electrical standards for an aerosol electrometer calibration in the range ± 20 fA to ± 40 fA. The technique used here simulated the condition of a current induced when
Displaying 501 - 525 of 1413
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