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Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR)

Robust deep-UV coherent light source for laser cooling of silicon atoms

Hiroshi Kumagai, Yuichi Asakawa, Katsumi Midorikawa, M. Obara

Published Nov 13, 2002• 0 citations
Publisher

Abstract

All-solid-state 252 nm coherent light source for laser cooling of silicon atoms was developed successfully by two-stage highly efficient frequency conversions with external cavities.
DOI
10.1109/cleopr.2001.971041

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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.
Highly efficient frequency conversions were conducted to obtain a deep-ultraviolet single-mode coherent light using two-stage external cavities. 154-mW power at around 252 nm was 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. The output performances of the deep-ultraviolet light source are sufficient for realizing the laser cooling of neutral silicon atoms and then their manipulation with an atomic mirror.
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.