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Topic Area: Optical Physics

Displaying records 41 to 50 of 59 records.
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41. Origin of Universal Optical Conductivity and Optical Stacking Sequence Identification in Multilayer Graphene
Topic: Optical Physics
Published: 8/6/2009
Authors: Hongki Min, Allan H. MacDonald
Abstract: We predict that the optical conductivity of normal graphene multilayers is close to {sigma}^duni^=({pi}/2) e^u2^/h per layer over a broad range of frequencies. The origin of this behavior is an emergent chiral symmetry which is present in normal N-l ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902107

42. Coherent linear optical sampling at over 15 bits of resolution
Topic: Optical Physics
Published: 7/15/2009
Authors: Ian R Coddington, William C Swann, Nathan Reynolds Newbury
Abstract: Linear optical sampling characterizes a sample by measuring the distortions on a transmitted optical field, thereby quantifying the sample's optical response. By exploiting the high mutual coherence between two phase-locked femtosecond fiber lase ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901722

43. A deep-UV optical frequency comb at 205 nm
Topic: Optical Physics
Published: 5/25/2009
Authors: Scott A Diddams, E Peters, P Fendel, S Reinhardt, T W Hansch, T Udem
Abstract: By frequency quadrupling a picosecond pulse train from a Ti:sapphire laser at 820 nm we generate a frequency comb at 205 nm with nearly bandwidth-limited pulses. The nonlinear frequency conversion is accomplished by two successive frequency doubling ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904616

44. NIST Technical Note No. 1621: Optical radiation measurements based on detector standards
Series: Technical Note (NIST TN)
Report Number: 1621
Topic: Optical Physics
Published: 3/11/2009
Author: George P Eppeldauer
Abstract: Improved detector technology in the past two decades opened a new era in the field of optical radiation measurements. Lower calibration and measurement uncertainties can be achieved with modern detector/radiometer standards than traditionally used s ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901369

45. Scatterfield Optical Imaging for sub-10 nm Dimensional Metrology
Topic: Optical Physics
Published: 1/1/2009
Author: Richard M Silver
Abstract: Recent developments in optical microscopy promise to advance optical metrology and imaging to unprecedented levels through theoretical and experimental development of a new measurement technique called "scatterfield optical imaging". ". Current met ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901009

46. Vector characterization of high-speed components using linear optical sampling with milliradian resolution
Topic: Optical Physics
Published: 12/1/2008
Authors: Paul A Williams, Tasshi Dennis, Ian R Coddington, William C Swann, Nathan Reynolds Newbury
Abstract: We demonstrate linear optical sampling measurements optimized for characterization of the signals produced by optical components. By sampling the optical electric field before and after the component, we isolate the full vector field (phase and ampli ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=33127

47. Computational Parameters in Simulation of Microscope Images
Topic: Optical Physics
Published: 11/28/2008
Authors: Egon Marx, James Edward Potzick
Abstract: The simulation of microscope images computed from scattered fields determined using integral equations depend on a number of parameters that are not related to the scatterer or to the microscope but are choices made for the computation method. The ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900912

48. Integral Equations for 3-D Scattering: Finite Strip on a Substrate
Topic: Optical Physics
Published: 11/28/2008
Author: Egon Marx
Abstract: Singular integral equations that determine the exact fields scattered by a dielectric or conducting finite strip on a substrate are presented. The computation of the image of such a scatterer from these fields by Fourier optics methods is also shown ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900896

49. Yb Optical Lattice Clock
Topic: Optical Physics
Published: 11/23/2008
Authors: Nathan D. Lemke, Andrew D Ludlow, Zeb Barber, N Poli, C.W. Hoyt, Long-Sheng Ma, Jason Stalnaker, Christopher W Oates, Leo Hollberg, James C Bergquist, A. Brusch, Tara Michele Fortier, Scott A Diddams, Thomas Patrick Heavner, Steven R Jefferts, Thomas Edward Parker
Abstract: We describe the development and latest results of an optical lattice clock based on neutral Yb atoms, including investigations based on both even and odd isotopes. We report a fractional frequency uncertainty below 10^u-15^ for ^u171^Yb.
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901008

50. Calibration of a Radiance Standard for the NPP/OMPS Instrument
Topic: Optical Physics
Published: 10/9/2008
Authors: Bettye C Johnson, James J. Butler, Scott J. Janz, Robert D. Saunders, John W. Cooper, Matthew G. Kowalewski, R Barnes
Abstract: In June 2007, a spherical integrating source was calibrated in the National Aeronautics and Space Administration(NASA) Goddard Space Flight Center‰s (GSFC) Calibration Facility as part of the prelaunch characterization program for the NPOESS Pre ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=842573



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