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William McGehee (Fed)


William McGehee is a physicist in the Atomic Devices and Instrumentation group in the Time and Frequency division at NIST. His research focuses on the development of fieldable quantum sensors based on laser-cooled gases and atomic beams using novel vacuum technology, integrated photonics, and optical spectroscopy. He has a long-standing interesting in applications for laser-cooled atoms including quantum simulation of highly-correlated systems and the production of high-brightness ion sources for nanotechnology applications. He received a B.S. in Physics from the Massachusetts Institute of Technology in 2008 and a Ph.D. in Physics from the University of Illinois at Urbana-Champaign in 2015.


A chip-scale atomic beam clock

Gabriela Martinez, Chao Li, Alexander Staron, John Kitching, Chandra Raman, William McGehee
We demonstrate a passively pumped, chip-scale atomic beam clock fabricated using a stack of silicon and glass wafers. The device could additionally serve as a

Inhomogenous Light Shifts of Coherent Population Trapping Resonances

Juniper Pollock, Valera Yudin, Alexey Taichenachev, Maxim Basalaev, D Kovalenko, Azure Hansen, John Kitching, William McGehee
Coherent population trapping (CPT) in atomic vapors using all-optical interrogation has enabled the miniaturization of microwave atomic clocks. Light shifts

Magneto-optical trapping using planar optics

William McGehee, Wenqi Zhu, Daniel Barker, Daron Westly, Alexander Yulaev, Nikolai Klimov, Amit Agrawal, Stephen Eckel, Vladimir Aksyuk, Jabez J. McClelland
Laser-cooled atoms are a key component of many calibration-free measurement platforms— including clocks, gyroscopes, and gravimeters—and are a promising

Patents (2018-Present)

Created August 15, 2019, Updated April 20, 2023