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Conferences

A novel solar simulator based on a super-continuum laser

Author(s)
Tasshi Dennis, John B. Schlager, Hao-Chih Yuan, Qi Wang, Daniel Friedman
The design and operation of a novel solar simulator based on a high-power, super-continuum fiber laser is described in this work. The simulator features a multi

Nanoparticle Size and Shape Evaluation Using the TSOM Method

Author(s)
Bradley N. Damazo, Ravikiran Attota, Premsagar P. Kavuri, Andras Vladar
A novel through-focus scanning optical microscopy (TSOM) method that yields nanoscale information from optical images obtained at multiple focal planes will be

Characteristics of Graphene for Quantized Hall Effect Measurements

Author(s)
Randolph E. Elmquist, Mariano A. Real, Irene G. Calizo, Brian G. Bush, Tian T. Shen, Nikolai N. Klimov, David B. Newell, Angela R. Hight Walker, Randall M. Feenstra
This paper describes concepts and measurement techniques necessary for characterization of graphene in the development of graphene-based quantized Hall effect

Graphene Epitaxial Growth on SiC(0001) for Resistance Standards

Author(s)
Mariano A. Real, Tian T. Shen, George R. Jones Jr., Randolph Elmquist, Johannes A. Soons, Albert Davydov
Epitaxial growth of graphene layers on 6H-SiC(0001) substrates have been studied in order to improve graphene's performance for metrological applications. A

SIM.EM-S5 Voltage, Current and Resistance Comparison

Author(s)
Harold Sanchez, Lucas Di Lillo, Gregory Kyriazis, Rodrigo Ramos, Randolph Elmquist, Nien F. Zhang
This paper reports the results of the second Interamerican Metrology System (SIM) comparison on calibration of digital multimeters, performed for strengthening

Modeling Gaps and Overlaps of Sustainability Standards

Author(s)
Paul W. Witherell, Sudarsan Rachuri, Anna D'Alessio
Organizational and production dispersions in manufacturing enterprises can create situations where manufacturers are asked to conform to multiple sustainability

Quality Information Framework - Integrating Metrology Processes

Author(s)
Fiona Zhao, Thomas Kramer, John A. Horst, William G. Rippey, Robert Brown
As defined by major dimensional metrology system users and suppliers, the Quality Information Framework (QIF) is an integrated and holistic set of information

Ultra-low-noise Regenerative Frequency Divider for High Spectral Purity RF Signal Generation

Author(s)
Archita Hati, Craig W. Nelson, Corey A. Barnes, Danielle G. Lirette, Jason A. DeSalvo, Tara M. Fortier, Franklyn J. Quinlan, Andrew D. Ludlow, Till P. Rosenband, Scott A. Diddams, David A. Howe
We implement an ultra-low-noise frequency divider chain from 8 GHz to 5 MHz that utilizes custom-built regenerative frequency divide-by-2 circuits. The single

A new algorithm for clock weights for the SIM time scale

Author(s)
Michael A. Lombardi, J. Mauricio Lopez-Romero, Nelida Diaz-Munoz, E. de Carlos-Lopez
A time and frequency comparison system has been developed for the Sistema Interamericano de Metrologia (SIM) region in order to compare in real time the time

A hybrid 10 GHz photonic-microwave oscillator with sub-femtosecond absolute timing jitter

Author(s)
Tara M. Fortier, Craig W. Nelson, Archita Hati, Franklyn J. Quinlan, Jennifer A. Taylor, Haifeng (. Jiang, Chin-Wen Chou, Nathan D. Lemke, Andrew D. Ludlow, David A. Howe, Christopher W. Oates, Scott A. Diddams
We demonstrate a 10 GHz hybrid oscillator comprised of a phase stabilized optical frequency comb divider and a room temperature dielectric sapphire oscillator

Blackbody effects in the Yb optical lattice clock

Author(s)
Andrew D. Ludlow, Jeffrey A. Sherman, Nathan D. Lemke, Kyle P. Beloy, Nathan M. Hinkley, M. Pizzocaro, Richard W. Fox, Christopher W. Oates
We report a high accuracy measurement of the differential static polarizability for the clock transition in a Yb lattice clock, a key parameter for determining

Vibrational analysis of stabilized lasers

Author(s)
Kenneth J. Hughes, Archita Hati, Craig W. Nelson, David A. Howe
Frequency-stabilized lasers are routinely used in a variety of research and application areas relating to laser-cooled atoms. Important applications in the cold

PM-AM Correlation Measurements and Analysis

Author(s)
David A. Howe, Archita Hati, Craig W. Nelson, Danielle G. Lirette
We measure and analyze effects of nonlinear mixing of phase-noise modulation (PM) and amplitude-noise modulation (AM) in an oscillating signal by real-time

Phase-Noise Measurement of a 670 GHz Source

Author(s)
Jason A. DeSalvo, Archita Hati, Craig W. Nelson, David A. Howe
We present phase-noise measurements in support of terahertz electronics. Using digital phase-noise measurement techniques and an even-harmonic mixer, we achieve

Microscopy for STEM Educators

Author(s)
Michael T. Postek, Mary B. Satterfield, Bradley N. Damazo, Robert Gordon
The future of our nation hinges on our ability to prepare our next generation to be innovators in science, technology, engineering and math (STEM). Excitement
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