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

We are developing an experimental system that pursues the observation of super- and subradiance of ⁸⁸Sr atoms in ordered arrays. To this end, we have developed a novel trapping approach that is based on optical tweezer arrays generated by holographic metasurfaces. These unique devices exhibit high power handling while creating densely packed arrays with μm-spacing and highly uniform trap intensities. We utilize Sr’s mid-infrared (³P₂-³D₃) transition at a wavelength of 2.9 μm to realize arrays with subwavelength spacing where strong cooperative emission is expected. We report on the first single-atom trapping and imaging in metasurface generated arrays, achieving a detection fidelity of >99%, and report on further progress towards super- and subradiance studies.