Towards Super- and Subradiance of Sr Atoms in Optical Tweezer Arrays

We report progress on an experimental system that is geared to realizing super- and subradiance of ⁸⁸Sr atoms in ordered optical tweezer arrays. As a first step, we prepare Sr atoms in their metastable ³P₂ and ³P₀ states and spectroscopically observe Sr’s mid-infrared (³P₂-³D₃) 2.9 μm line. Furthermore, we examine a potential magic wavelength for this transition, highlighting single-atom trapping, cooling, and imaging capabilities at this new wavelength. This setup will enable the study of super- and subradiance in subwavelength-spaced tweezer arrays with flexible geometries, generated in our setup via holographic metasurfaces.