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arXiv · 2509.22958

Interfacing of an optical nanofiber with tunably spaced atoms in an optical lattice

Hyok Sang Han·Ahreum Lee·Sarthak Subhankar·Fredrik K. Fatemi·S. L. Rolston
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Abstract

We experimentally demonstrate efficient interfacing of a large number of atoms to an optical nanofiber using an optical lattice with tunable spacing ($0.88-1.5~\mu$m) projected onto the nanofiber. The lattice beam and reflections from the nanofiber yield trap potentials that provide tight confinement in all motional degrees of freedom $\approx 220$ nm above the nanofiber surface, enabling efficient atom-photon coupling. We achieve trapping of $\approx1300$ atoms in periodic trap sites with a trap lifetime of $\approx15$ ms. We also observe the effect of varied lattice periods on the atomic motional frequencies. Our new scheme is adaptable to other nanophotonic cold-atom systems and provides a versatile and scalable platform for studying photon-mediated long-range collective interactions.

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Hyok Sang Han, Ahreum Lee, Sarthak Subhankar, Fredrik K. Fatemi, S. L. Rolston. 2025-09-26. Interfacing of an optical nanofiber with tunably spaced atoms in an optical lattice. https://arxiv.org/abs/2509.22958

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