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Search Publications

NIST Authors in Bold

Displaying 18576 - 18600 of 73929

Frequency Modulated Charge Pumping with Extremely High Gate Leakage

February 13, 2015
Author(s)
Jason T. Ryan, Jibin Zou, Jason P. Campbell, Richard Southwick, Kin P. Cheung, Anthony Oates, Rue Huang
Charge pumping (CP) has proven itself as one of the most utilitarian methods to quantify defects in metal-oxide-semiconductor devices. In the presence of low to moderate gate leakage, CP quantification is most often implemented via a series of measurements

Randomized methods for rank-deficient linear systems

February 13, 2015
Author(s)
Josef Sifuentes, Zydrunas Gimbutas, Leslie Greengard
We present a simple, accurate method for solving consistent, rank-deficient linear systems, with or without additional rank-completing constraints. Such problems arise in a variety of applications, such as the computation of the eigenvectors of a matrix

Scaling of Testing Speed for Different Source-to-Detector Distances

February 13, 2015
Author(s)
Bruce R. Norman, Anne L. Sallaska, Leticia Pibida
Several American National Standard Institute/Institute of Electrical and Electronics Engineers (ANSI/IEEE) and International Electrotechnical Commission (IEC) standards were developed for radiation detection systems used for homeland security applications

Temperature-dependent structure of Tb-doped magnetite nanoparticles

February 13, 2015
Author(s)
Katherine P. Rice, Stephen E. Russek, Roy H. Geiss, Justin Shaw, Robert J. Usselman, Eric R. Evarts, Thomas J. Silva, Hans Nembach, Elke Arenholz, Yves U. Idzerda
High quality 5 nm cubic Tb-doped magnetite nanoparticles have been synthesized by a modified wet-chemical method to investigate tailoring of magnetic properties for imaging and biomedical applications. We show that the Tb is incorporated into the

Near-Field Asymmetries in Plasmonic Resonators

February 12, 2015
Author(s)
Vladimir Aksyuk, Basudev Lahiri, Glenn Holland, Andrea Centrone
Surface-enhanced infrared absorption (SEIRA) spectroscopy exploits the locally enhanced field surrounding plasmonic metamaterials to increase the sensitivity of infrared spectroscopy. Light polarization and incident angle are important factors for exciting

Effects of wafer noise on the detection of 20 nm defects using optical volumetric inspection

February 11, 2015
Author(s)
Bryan M. Barnes, Francois R. Goasmat, Martin Y. Sohn, Hui Zhou, Andras Vladar, Richard M. Silver
Patterning imperfections in semiconductor device fabrication may either be noncritical [e.g., line edge roughness (LER)] or critical, such as defects that impact manufacturing yield. As the sizes of the pitches and linewidths decrease in lithography

Giant Negative Thermal Expansion in Bonded MnCoGe-Based Compounds with Ni 2 In-Type Hexagonal Structure

February 11, 2015
Author(s)
Ying-Ying Zhao, Feng-Xia Hu, Li-Fu Bao, Jing Wang, Hui Wu, Qingzhen Huang, Rong-Rong Wu, Yao Liu, Fei-Ran Shen, Hao Kuang, Ming Zhang, Wen-Liang Zuo, Xin-Qi Zheng, Ji-Rong Sun, Bao-Gen Shen
MnCoGe-based compounds undergo a large negative thermal expansion (NTE) during the martensitic structural transition from Ni 2In-type hexagonal to TiNiSi-type orthorhombic structure. High resolution neutron diffraction experiments revealed that the

Highly efficient generation of single-mode photon pairs from a crystalline whispering-gallery-mode resonator source

February 11, 2015
Author(s)
Michael Fortsch, Gerhard Schunk, Josef Furst, Dmitry Strekalov, Thomas Gerrits, Martin Stevens, Florian Sedlmeir, Harald G. Schwefel, Gerd Leuchs, Christoph Marquardt
We report on the highly-efficient generation of narrow-band pair-photons in one single spatiotemporal mode using parametric down-conversion in a crystalline whispering gallery mode resonator. We developed the requirements on phase-matching conditions in

(NISTIR 8042) Integrating Electronic Health Records into Clinical Workflow: An Application of Human Factors Modeling Methods to Specialty Care in Obstetrics and Gynecology and Ophthalmology

February 10, 2015
Author(s)
Svetlana Z. Lowry, Mala Ramaiah, Emily S. Patterson, Latkany A. Paul, David Brick, Michael C. Gibbons
In this report, a human factors workflow modeling tool, process mapping, was used to visualize and document insights and the end-user needs to improve EHR workflow for clinicians in two specialty outpatient care settings: 1) Obstetrics and Gynecology (Ob

Attosecond timing in optical-to-electrical conversion

February 10, 2015
Author(s)
Frederick N. Baynes, Franklyn J. Quinlan, Tara M. Fortier, Qiugui Zhou, Andreas Beling, Joe C. Campbell, Scott A. Diddams
The most frequency-stable sources of electromagnetic radiation are produced optically, and optical frequency combs provide the means for high fidelity frequency transfer across hundreds of terahertz and into the microwave domain. A critical step in the

Determination of the compliance of NIST Charpy Impact Machines

February 10, 2015
Author(s)
Enrico Lucon
The compliance of a Charpy impact machine, CM, can be measured by means of a low-blow elastic test on an unnotched Charpy-type specimen, provided an instrumented striker is used. The resulting force/time and force/displacement test records can be analyzed

Graph-based analysis of nonreciprocity in coupled-mode systems

February 10, 2015
Author(s)
Leonardo M. Ranzani, Jose A. Aumentado
In this work we derive the general conditions for obtaining nonreciprocity in multi-mode parametrically- coupled systems. The results can be applied to a broad variety of optical, microwave, and hybrid systems including recent electro- and opto-mechanical

Neutron Inelastic Scattering Measurements of Low-Energy Phonons in the Multiferroic BiFeO 3

February 10, 2015
Author(s)
John A. Schneeloch, Zhijun Xu, Jinsheng Wen, Peter M. Gehring, Christopher Stock, M. Matsuda, B. Winn, Genda Gu, S. M. Shapiro, R. J. Birgeneau, T. Ushiyama, Y. Yanagisawa, Y. Tomioka, T. Ito, Guangyong Xu
We present neutron inelastic scattering measurements of the low-energy phonons in single crystal BiFeO3. The dispersions of the three acoustic phonon modes (LA along [100], TA1 along [010] and TA2 along [1¯10]) and two low energy optic phonon modes (LO and

Reducing Block Copolymer Interfacial Widths through Polymer Additives

February 10, 2015
Author(s)
Daniel F. Sunday, Regis J. Kline
There is a need to design new materials to achieve smaller pitches and reduced interfacial widths for use in the nanopatterning of block copolymers (BCPs). One option is the use of blends, where the addition of a homopolymer which selectively associates to

Understanding the Decreased Segmental Dynamics of Supported Thin Polymer Films Reported by Incoherent Neutron Scattering

February 10, 2015
Author(s)
Changhuai Ye, Clinton G. Wiener, Madhu Sudan Tyagi, David Uhrig, Sara Orski, Christopher Soles, Bryan D. Vogt, David S. Simmons
Incoherent neutron scattering (INS) has commonly reported a suppression of segmental dynamics for supported thin polymer films as thickness is decreased, which is counter to expectations based on other measurement techniques such as ellipsometry and

Optical atomic clocks

February 9, 2015
Author(s)
Andrew D. Ludlow, Martin M. Boyd, Jun Ye, E. Peik, P. O. Schmidt
Optical atomic clocks represent the state-of-the-art in the frontier of modern measurement science. In this article we provide a detailed review on the development of optical atomic clocks that are based on trapped single ions and many neutral atoms. We
Displaying 18576 - 18600 of 73929
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