2015/09/10 by Ryuta Yamamoto, Jun Kobayashi, Takuma Kuno +2 · 1 citation
Physics and Astronomy · #cond-mat.quant-gas #physics.atom-ph
paper · pdf · doi:10.1088/1367-2630/18/2/023016
published as New Journal of Physics 18, 023016 (2016) · 14 pages, 6 figures
arxiv created 2015/09/10 · arxiv updated 2016/04/21
We demonstrate site-resolved imaging of individual bosonic 174Yb atoms in a Hubbard-regime two-dimensional optical lattice with a short lattice constant of 266 nm. To suppress the heating by probe light with the 1S0-1P1 transition of the wavelength λ = 399 nm for high-resolution imaging and preserve atoms at the same lattice sites during the fluorescence imaging, we simultaneously cool atoms by additionally applying narrow-line optical molasses with the 1S0-3P1 transition of the wavelength λ = 556 nm. We achieve a low temperature of T = 7.4(1.3) μK, corresponding to a mean oscillation quantum number along the horizontal axes of 0.22(4) during imaging process. We detect on average 200 fluorescence photons from a single atom within 400 ms exposure time, and estimate the detection fidelity of 87(2)%. The realization of a quantum gas microscope with enough fidelity for Yb atoms in a Hubbard-regime optical lattice opens up the possibilities for studying various kinds of quantum many-body systems such as Bose and Fermi gases, and their mixtures, and also long-range-interacting systems such as Rydberg states.