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Quantum 2.0 Conference and Exhibition

Laser Cooling and Spectroscopy of Atomic Si for Silicon-Based Quantum Applications

Jerry Sell, Alina Gearba, Anita N. Dunsmore, Carl E. Mungan, S. J. Angus, Matthew Romines, Brayden Siekert, Connor Barberi, Noah S. Everett, Carson McLaughlin, Randy Knize

Published Jan 1, 2023• 0 citations
Publisher

Abstract

Laser cooling of silicon could provide a new technique to manipulate individual Si isotopes. We perform laser spectroscopy on a Si atomic beam at 252 nm to measure the isotope shifts between 28 − 30Si. This article has been approved for public release: distribution unlimited (USAFA-DF-2023-61).
DOI
10.1364/quantum.2023.qth2a.39

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We have first developed an all-solid-state 252 nm coherent light source for laser cooling of silicon atoms. This can give an impetus to research into the manipulation of the atomic motion of silicon atoms toward nanoprocess applications. Therefore, we developed an experimental setup for silicon atom manipulation. It was found that a high-quality silicon atomic beam, useful for nanoprocess applications, is obtainable with manipulation using the coherent light source in the system. With this unique apparatus, we continue the challenge to demonstrate the spatial design of nuclear spins of the family of isotopes with laser cooling of Si.
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Laser cooling techniques of silicon may be a powerful tool to create a new silicon road map. In the first step, to realize the laser cooling of neutral silicon atoms highly efficient frequency conversions are conducted to obtain a deep-ultraviolet single-mode coherent light using two-stage external cavities. The 154-mW power at around 252 nm is obtained with a conversion efficiency of more than 8% by doubly resonant sum-frequency mixing of 373-nm light from the first-stage conversion and 780-nm light from a single-mode Ti:sapphire laser. This paper reviews a series of challenges for taking possession of the spatial design of nuclear spins of the family of stable isotopes with laser cooling of silicon.