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Title: Laser-induced thermal source for cold atoms
Authors: Hsu, Chung Chuan
Larue, Rémy
Kwong, Chang Chi
Wilkowski, David
Keywords: Science::Physics
Issue Date: 2022
Source: Hsu, C. C., Larue, R., Kwong, C. C. & Wilkowski, D. (2022). Laser-induced thermal source for cold atoms. Scientific Reports, 12(1), 868-.
Project: MOE2018-T2-1-082 (S)
Journal: Scientific Reports
Abstract: We demonstrate a simple and compact approach to laser cool and trap atoms based on laser-induced thermal ablation (LITA) of a pure solid granule. A rapid thermalisation of the granule leads to a fast recovery of the ultra-high vacuum condition required for a long trapping lifetime of the cold gas. We give a proof-of-concept of the technique, performing a magneto-optical trap on the 461 nm [Formula: see text] transition of strontium. We get up to 3.5 million of cold strontium-88 atoms with a trapping lifetime of more than 4 s. The lifetime is limited by the pressure of the strontium-free residual background vapour. We also implement an original configuration of permanent magnets to create the quadruple magnetic field of the magneto-optical trap. The LITA technique can be generalized to other atomic elements such as transition metals and lanthanide atoms, and shows a strong potential for applications in quantum technologies ranging from quantum computing to precision measurements such as outdoor inertial sensing.
ISSN: 2045-2322
DOI: 10.1038/s41598-021-04697-4
Schools: School of Physical and Mathematical Sciences 
Organisations: National University of Singapore
Research Centres: MajuLab
Rights: © 2022 The Author(s). This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit
Fulltext Permission: open
Fulltext Availability: With Fulltext
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