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Article Dans Une Revue Scientific Reports Année : 2022

Laser-induced thermal source for cold atoms

Chung Chuan Hsu
  • Fonction : Auteur
Chang Chi Kwong
  • Fonction : Auteur
David Wilkowski

Résumé

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 $^1S_0\rightarrow \,^1P_1$ 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.

Dates et versions

hal-03356412 , version 1 (28-09-2021)

Identifiants

Citer

Chung Chuan Hsu, Rémy Larue, Chang Chi Kwong, David Wilkowski. Laser-induced thermal source for cold atoms. Scientific Reports, 2022, 12 (1), pp.868. ⟨10.1038/s41598-021-04697-4⟩. ⟨hal-03356412⟩
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