Ms. Susan Schima Profile

Susan Schima

at National Institute of Standards and Technology

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Proceedings Article | 25 February 2020 Presentation + Paper

Atomic flux circuits

Douglas Bopp, Ellyse Taylor, Khoa Le, Susan Schima, Matthew Hummon, John Kitching

Proceedings Volume 11296, 112961O (2020) https://doi.org/10.1117/12.2552585

KEYWORDS: Rubidium, Chemical species, Semiconducting wafers, Silicon, Microfabrication, Optical resonators, Oxides, Spectroscopy, Glasses, Deep reactive ion etching

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Atomic vapors are a crucial platform for precision metrology but in their simplest implementation, a thermal vapor, the intrinsic optical resonances are broadened due to the random and isotropic thermal motion of the atoms. By structuring the container of a thermal vapor with narrow emission apertures, the velocity distribution can be modified to create a directed beam of atoms.¹ These atomic beams can then interact sequentially with a series of optical fields, or interaction zones, and ultimately allow precision control over the internal state of the atom. This is useful for optical frequency standards and precision spectroscopy^{2, 3} and may also provide the means to build a simple flying qubit platform.⁴ Furthermore, atomic beams on a chip can be used as a compact, directed source to load magneto-optical traps (MOTs) while minimally increasing the ambient pressure.⁵ We apply microfabrication techniques to microscopically structure silicon to deterministically control the ow of Rb between connected cavities. We describe a methodology to measure the experimental parameters that govern the flux of atomic vapors in these microfabricated structures with a goal of creating an equivalent electrical circuit model. This toolkit will provide a simple platform for the creation of atomic beams on a chip with controllable pressure profiles and a thorough understanding of the influence of adsorptive effects and pseudo- ballistic trajectories on the resultant atomic beam.

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