Imaging a Li 6 Atom in an Optical Tweezer 2000 Times with Λ -Enhanced Gray Molasses
2023; American Physical Society; Volume: 131; Issue: 8 Linguagem: Inglês
10.1103/physrevlett.131.083001
ISSN1092-0145
AutoresKarl N. Blodgett, David Peana, Saumitra S. Phatak, Lane M. Terry, Maria Paula Montes, Jonathan D. Hood,
Tópico(s)Atomic and Subatomic Physics Research
ResumoWe have imaged lithium-6 thousands of times in an optical tweezer using $\mathrm{\ensuremath{\Lambda}}$-enhanced gray molasses cooling light. Despite being the lightest alkali metal, with a recoil temperature of $3.5\text{ }\text{ }\mathrm{\ensuremath{\mu}}\mathrm{K}$, we achieve an imaging survival of 0.999 50(2), which sets the new benchmark for low-loss imaging of neutral atoms in optical tweezers. Lithium is loaded directly from a magneto-optical trap into a tweezer with an enhanced loading rate of 0.7. We cool the atom to $70\text{ }\text{ }\mathrm{\ensuremath{\mu}}\mathrm{K}$ and present a new cooling model that accurately predicts steady-state temperature and scattering rate in the tweezer. These results pave the way for ground state preparation of lithium en route to the assembly of the LiCs molecule in its ground state.
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