Optical tweezer arrays combined with the rich internal structure of alkaline earth atoms enable explorations of new quantum systems for quantum optics, quantum simulation, and quantum computing. We report on our progress towards programmable arrays of strontium atoms generated with holographic metasurfaces. Innovations of our setup include: (1) Demonstration of a novel dispenser-based 2D MOT for strontium that provides a high atomic flux while being compact. (2) The development and implementation of holographic metasurfaces for the creation of high quality optical tweezer arrays with arbitrary geometries in 1D, 2D, and 3D. We have thoroughly characterized the light patterns generated by the metasurfaces and find that they efficiently produce high-quality trapping potentials. We have performed the characterization with 520 nm light, which is an unexplored magic wavelength of the strontium intercombination line. Recently, we have created an ultracold strontium gas at 1 $\mu$K via narrow line cooling. In the next step, we will trap strontium in holographic optical tweezer arrays. The scientific goals of this platform are the creation of highly entangled many-body quantum states that display subradiance, as well as applications in quantum simulation and quantum computation.
We acknowledge support from NSF QII-TAQS and NSF Convergence Accelerator. W.Y. acknowledges support from the Croucher Foundation.
|Presenter name||Yuan, Weijun|
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