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Displaying records 51 to 60 of 211 records.
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51. Quantitative Measurements of the Size Scaling of Linear and Circular DNA in Nanofluidic Slitlike Confinement
Topic: Physics
Published: 2/14/2012
Authors: Elizabeth A Strychalski, Jon C Geist, Michael Gaitan, Laurie E Locascio, Samuel M Stavis
Abstract: Quantitative size measurements of single linear and circular DNA molecules in nanofluidic slitlike confinement are reported. A novel experimental method using DNA entropophoresis down a nanofluidic staircase implemented comprehensive variation of sl ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908052

52. Standardization of Broadband UV Measurements for 365 nm LED Sources
Series: Journal of Research (NIST JRES)
Report Number: 117.004
Topic: Physics
Published: 2/2/2012
Author: George P Eppeldauer
Abstract: Broadband UV measurements are analyzed when UV-A irradiance meters measure optical radiation from 365-nm sources. The CIE standardized rectangular-shape UV-A function can be realized only with large spectral mismatch errors. The spectral power-di ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909003

53. Fourier, Gauss, Fraunhofer, Porod and the Shape from Moments Problem
Topic: Physics
Published: 1/17/2012
Author: Gregg M. Gallatin
Abstract: We show how the Fourier transform of a shape in any number of dimensions can be simplified using Gauss' law and evaluated explicitly for polygons in two dimensions, polyhedra three dimensions, etc. We also show how this combination of Fourier and Gau ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909668

54. Energy Levels and Observed Spectral Lines of Neutral and Singly Ionized Titanium, Ti I and Ti II
Series: J. Phys. & Chem. Ref. Data (JPCRD)
Topic: Physics
Published: 1/12/2012
Author: Edward Barry Saloman
Abstract: The energy levels and observed spectral lines of neutral and singly ionized titanium atoms have been compiled. Tables of energy levels and spectral lines are generated for each stage. Experimental g-factors and leading percentages are included when ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909339

55. M-ary state phase-shift keying discrimination below the homodyne limit
Topic: Physics
Published: 12/22/2011
Authors: Francisco E. Becerra Chavez, Jingyun Fan, Gerald Baumgartner, Sergey V Polyakov, Julius Goldhar, Jonathan Kosloski, Alan L Migdall
Abstract: We investigate a strategy for M-ary discrimination of nonorthogonal phase states with error rates below the homodyne limit. This strategy uses feed forward to update a reference field and Signal nulling for the state discriminati ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908874

56. High-resolution single-mode fiber-optic distributed Raman sensor for absolute temperature measurement using superconducting nanowire single-photon detectors
Topic: Physics
Published: 11/17/2011
Authors: Michael G. Tanner, Shellee Dawn Dyer, Burm Baek, Robert Hadfield, Sae Woo Nam
Abstract: We demonstrate a distributed fiber Raman sensor for absolute temperature measurement with spatial resolution on the order of 1 cm at 1550 nm wavelength in single mode fiber using superconducting nanowire single photon detectors. Rapid measurements ar ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908723

57. Uncertainty analysis for a high-spatial resolution single-mode fiber-optic distributed temperature sensor
Topic: Physics
Published: 11/17/2011
Authors: Shellee Dawn Dyer, Michael Tanner, Burm Baek, Robert Hadfield, Sae Woo Nam
Abstract: We demonstrate a high-accuracy distributed fiber optic temperature sensor using superconducting nanowire single-photon detectors and single photon counting techniques. Our demonstration uses inexpensive single-mode fiber at standard telecommunication ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910008

58. Generation and characterization of high-purity, pulsed squeezed light at telecom wavelengths from pp-KTP
Topic: Physics
Published: 11/15/2011
Authors: Thomas Gerrits, Martin J Stevens, Burm Baek, Brice R. Calkins, Adriana Eleni Lita, Scott C Glancy, Emanuel H Knill, Sae Woo Nam, Richard P Mirin, Robert Hadfield, Ryan Bennink, Warren Grice, Sander N. Dorenbos, Tony Zijlstra, Teun Klapwijk, Val Zwiller
Abstract: We characterize a pp-KTP crystal designed to produce pure single mode squeezed vacuum at 1570 nm. Measurements show a raw (corrected) Hong-Ou-Mandel interference with 86 % (90 %) visibility and a circular joint spectral probability distribution with ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908774

59. Carbon nanotube arrays for absolute IR and THz radiometry
Topic: Physics
Published: 10/2/2011
Authors: John H Lehman, Kerry N. Betz, Erich N Grossman
Abstract: We have assembled and evaluated a novel electrically calibrated thermopile having an array of 1.5 mm long multiwalled carbon nanotubes as the radiation absorber. We find very low reflectance at the 390 {mu}m laser wavelength and excellent agreeme ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908949

60. SEM Induced Shrinking of Solid State Nanopores for Single Molecule Detection
Topic: Physics
Published: 9/22/2011
Authors: Anmiv Prahbu, Kevin J Freedman, Joseph William Robertson, Zhorro Nikolov, John J Kasianowicz, MinJun Kim
Abstract: We have investigated the shrinkage of solid state nanopores by a scanning electron microscope and find the process to be reproducible and dependant beam parameters such as the accelerating voltage and electron flux. The shrinking phenomenon does ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907430



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