Optical Tweezer Arrays Created by Holographic Metasurfaces

We report on the creation of optical tweezer arrays generated by holographic metasurfaces. Metasurfaces allow full holographic control over light fields, enabling the creation of arbitrary optical trapping geometries. We have designed and fabricated patterns spanning 1D to 3D, featuring quasicrystal, twisted bilayer honeycomb, and 3D cubic lattice structures. We have characterized the metasurfaces with a 520 nm laser, studying the thermal response under high power, trap homogeneity, and position accuracy. In addition, we have created and characterized metasurfaces that can switch between two trapping geometries via polarization tuning. We are working towards trapping strontium atoms using this novel nanophotonic platform.