U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications

NIST Authors in Bold

Displaying 826 - 850 of 2503

Generating few-cycle pulses with integrated nonlinear photonics

December 10, 2019
Author(s)
David Carlson, Phillips Hutchison, Daniel D. Hickstein, Scott Papp
Ultrashort laser pulses that last only a few optical cycles have been transformative tools for studying and manipulating ultrafast light--matter interactions. These few-cycle pulses are typically produced from high-peak-power lasers, either directly from

Jovian Auroral Ion Precipitation: X-Ray Production from Oxygen and Sulfur Precipitation

December 9, 2019
Author(s)
Heman Gharibnejad, David Schultz, Thomas Cravens, Stephen Houston, W. R. Dunn, D. K. Haggerty, A. M. Rymer, B. H. Mauk, N. Ozak
Many attempts have been made to model X-ray emission from both bremsstrahlung and ion precipitation into Jupiter’s polar caps. Electron bremsstrahlung modeling has fallen short of producing the total overall power output observed by earth-orbit-based X-ray

Spectrum of Ni V in the Vacuum Ultraviolet

November 27, 2019
Author(s)
Jacob W. Ward, A J. Raassen, Alexander Kramida, Gillian Nave
This work presents 97 remeasured Fe V wavelengths (1200 Å to 1600 Å) and 123 remeasured Ni V wavelengths (1200 Å to 1400 Å) with uncertainties of approximately 2 mÅ. An additional 67 remeasured Fe V wavelengths and 72 remeasured Ni V wavelengths with

A kilopixel array of superconducting nanowire single-photon detectors

November 18, 2019
Author(s)
Varun Verma, Adriana Lita, Sae Woo Nam, R P. Mirin, Emma Wollman, William Farr, Matthew Shaw
We present a 1024-element imaging array of superconducting nanowire single photon detectors (SNSPDs) using a 32x32 row-column multiplexing architecture. Large arrays are desirable for applications such as imaging, spectroscopy, or particle detection.

Soft X-ray spectroscopy with transition-edge sensors at Stanford Synchrotron Radiation Lightsource beamline 10-1

November 5, 2019
Author(s)
Sang-Jun Lee, Charles Titus, Roberto A. Mori, Michael Baker, Douglas Bennett, Hsiao-Mei Cho, W.Bertrand (Randy) Doriese, Joseph Fowler, Kelly J. Gaffney, Allesandro Gallo, Johnathon Gard, Gene C. Hilton, Hoyoung Jang, Young I. Joe, Christopher Kenney, Jason Knight, Thomas Kroll, Jun-Sik Lee, Dale Li, Donhui Lu, Ronald Marks, Michael Minitti, Kelsey Morgan, Ogasawara Hirohito, Galen O'Neil, Carl D. Reintsema, Dan Schmidt, Dimosthenis Sokaras, Joel Ullom, Tsu-Chien Weng, Christopher Williams, Betty A. Young, Daniel Swetz, Kent D. Irwin, Dennis Nordlund
We present results obtained with a new soft X-ray spectrometer based on transition-edge sensors (TESs) composed of Mo/Cu bilayers coupled to bismuth absorbers. This spectrometer simultaneously provides excellent energy resolution, high detection efficiency

Optical-Clock-Based Time Scale

October 30, 2019
Author(s)
Jian Yao, Jeffrey A. Sherman, Tara M. Fortier, Andrew D. Ludlow, Holly Leopardi, Thomas E. Parker, William F. McGrew, Scott A. Diddams, Judah Levine
A time scale is a procedure for accurately and continuously marking the passage of time. It is exemplified by coordinated universal time (UTC), and provides the backbone for critical navigation tools such as the global positioning system (GPS). Present

Subharmonic Entrainment of Kerr Breather Solitons

October 25, 2019
Author(s)
Daniel Cole, Scott Papp
We predict subharmonic entrainment of breather-soliton oscillations to a periodic perturbation at the round-trip time TR in Kerr-nonlinear optical resonators; an integer ratio Tb=TR ¼ N ≫ 1 results for breathing period Tb. Rigid entrainment is observed

A stroboscopic approach to trapped-ion quantum information processing with squeezed phonons

October 24, 2019
Author(s)
Wenchao Ge, Brian C. Sawyer, Joseph W. Britton, Kurt Jacobs, Michael Foss-Feig, John Bollinger
In trapped-ion quantum information processing, interactions between spins (qubits) are mediated by collective modes of motion of an ion crystal. While there are many different experimental strategies to design such interactions, they all face both

Biomimetic Approach to Inhibition of Photooxidation in Organic Solar Cells Using Beta-Carotene as an Additive

October 14, 2019
Author(s)
Sebastian Engmann, Vida Turkovic, Michela Prete, Mikkel Bregnhoj, Liana Inasaridze, Dmytro Volyniuk, Filipp Obrezkov, Juozas V. Grazulevicius, Horst G. Rubahn, Pavel Troshin, Peter R. Ogilby, M. Madsen
Recent improvements in the power conversion efficiencies of organic photovoltaic (OPV) cells have highlighted the fact that OPV device lifetimes are now the main bottleneck for further advances of this technology. As such, understanding and controlling

Detecting Sub-GeV Dark Matter with Superconducting Nanowires

October 10, 2019
Author(s)
Varun Verma, Sae Woo Nam, Ilya Charaev, Marco Colangelo, Karl Berggren, Yonit Hochberg
We propose the use of superconducting nanowires as both target and sensor for direct detection of light dark matter. With excellent sensitivity to low-energy deposits on electrons, and demonstrated low dark counts, such devices could be used to probe

Light-Shift Suppression with Novel Variants of Adaptive Ramsey Spectroscopy

October 3, 2019
Author(s)
Moshe Shuker, Juniper Pollock, John Kitching, Elizabeth Donley, Rodolphe Boudot, V. I. Yudin, A. V. Taichenachev
We present a brief review of the rapidly growing field of autobalanced Ramsey spectroscopy followed by a detailed discussion and review of two novel techniques that were developed and tested in our laboratory: displaced frequency-jump Ramsey spectroscopy

Multipath Mitigation from FM-AM Correlation

October 3, 2019
Author(s)
Archita Hati, Craig W. Nelson
Multipath is one of the limiting factors for an accurate outdoor and indoor localization. We proposed an approach that uses a multipath mitigation derived from the undesired frequency-to- amplitude conversion of a frequency modulated (FM) signal

Lattice theory for binding of linear polymers to a solid substrate from polymer melts: II. Influence of van der Waals interactions and chain semi?exibility on molecular binding and adsorption

September 30, 2019
Author(s)
Jack F. Douglas, Jacek Dudowicz, Karl Freed
The Polymeric Langmuir Theory (PLT), developed in Paper I, is employed to investigate the influence of van der Waals interactions and chain rigidity on the thermodynamics of the reversible molecular binding to interfaces in one component polymer fluids

Systematic uncertainty due to background-gas collisions in trapped-ion optical clocks

September 30, 2019
Author(s)
Aaron M. Hankin, Ethan Clements, Huang Yao, Samuel M. Brewer, Jwo-Sy Chen, Chin-wen Chou, David Hume, David Leibrandt
We describe a framework for calculating the frequency shift and uncertainty of trapped-ion optical atomic clocks caused by background-gas collisions, and apply this framework to an 27Al+ quantum-logic clock to enable a total fractional systematic
Displaying 826 - 850 of 2503
Was this page helpful?