Fine structure investigation and laser cooling study of the LaH molecule
A theoretical feasibility study of the spin-orbit laser cooling of the molecule LaH has been performed based on a complete active space self-consistent field (CASSCF)/MRCI <i>ab initio</i> calculation with Davidson correction in the <i>Λ</i> <sup>(±)</sup> and <i>Ω</i> <sup>(±)</sup> representations. The adiabatic potential energy curves and spectroscopic constants have been investigated for the considered electronic states. The small value of the equilibrium positions difference Δ<i>R</i> <sub>e</sub> between the ground and the electronic states <i>X</i> <sup>3</sup> <i>Σ</i> <sub>0+</sub>, (1)<sup>3</sup> <i>Π</i> <sub>0+</sub>, and (1)<sup>3</sup> <i>Δ</i> <sub>1</sub> predicts the candidacy of the molecule LaH for direct laser cooling between the first two states with the intermediate state (1)<sup>3</sup> <i>Δ</i> <sub>1</sub>. The calculation of the diagonal Franck-Condon factors, the short radiative lifetime, and the experimental parameters (slowing distance, Doppler and recoil temperature, …) suggest that the molecule LaH is a good candidate for Doppler laser cooling, and a corresponding laser cooling scheme is presented.
Authors
- Nayla El‐Kork (ORCID: https://orcid.org/0000-0002-5402-4951)
- Nissrin Alharzali
- Nariman Abu el kher (ORCID: https://orcid.org/0009-0004-9830-2169)
- Mahmoud Korek (ORCID: https://orcid.org/0000-0001-9684-8433)
- Joumana Assaf (ORCID: https://orcid.org/0000-0001-6746-5222)
Institutions
- Lebanese University (LB)
- Khalifa University of Science and Technology (AE)
- Beirut Arab University (LB)
- National Council for Scientific Research (LB)
Publication Details
- Journal
- RSC Advances
- Published
- 2025-01-01
- DOI
- https://doi.org/10.1039/d5ra02708j
- Primary Topic
- Optical properties and cooling technologies in crystalline materials
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Khalifa University of Science, Technology and Research
- Department of Education and Knowledge