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Roger Brown (Fed)

Roger Brown is a Physicist in the Neutral Atom Optical Clocks group in the Time & Frequency Division at NIST. His work focuses on the development of a transportable Ytterbium optical lattice clock. This project will contribute to the redefinition of the SI second, benchmark novel commercial and industrial optical clocks, and act as a quantum sensor to test the theory of General Relativity via geodetic measurements.

https://www.nist.gov/programs-projects/portable-optical-lattice-clock 

Full texts of all TF division publications: https://tf.nist.gov/general/publications.htm

Full publication list on Google Scholar  

Awards

Publications

Lattice Light Shift Evaluations In a Dual-Ensemble Yb Optical Lattice Clock

Author(s)
Tobias Bothwell, Roger Brown, Benjamin Hunt, Jacob Siegel, Tanner Grogan, Youssef Hassan, Kyle Beloy, Andrew Ludlow, Kurt Gibble, Takumi Kobayashi, Marianna Safronova, Sergey Porsev
In state-of-the-art optical lattice clocks, beyond-electric-dipole polarizability terms lead to a break-down of magic wavelength trapping. In this Letter, we

Clock-line-mediated Sisyphus Cooling

Author(s)
Jacob Siegel, Benjamin Hunt, Tanner Grogan, Youssef Hassan, Kyle Beloy, Roger Brown, Andrew Ludlow, Chun-Chia Chen, Kurt Gibble
We demonstrate sub-recoil Sisyphus cooling using the long-lived 3P0 clock state in alkaline-earthlike ytterbium. A 1388 -nm optical standing wave nearly
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Patents (2018-Present)

Spherical Ion Trap and Trapping Ions

NIST Inventors
Jeffrey Sherman , David Hume and Roger Brown
A spherical ion trap includes a substrate and an ion aperture; two RF electrodes in electrostatic communication with an ion trapping region; RF ground electrodes in electrostatic communication with the ion trapping region; and the ion trapping region bounded by opposing RF electrodes and the RF
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Created July 7, 2020, Updated December 9, 2024