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We present results on trapping ensembles of cold atoms with metasurface optics for portable atomic clock application, and progress towards single atom trapping and detection in high-NA optical tweezers with dielectric metalenses.

We show that with a purely blue-detuned cooling mechanism we can densely load single neutral atoms into large arrays of shallow optical tweezers. With this ability, more efficient assembly of larger ordered arrays will be possible - hence expanding the number of particles available for bottom-up quantum simulation and computation with atoms. Using Lambda-enhanced grey molasses on the D1 line of 87Rb, we achieve loading into a single 0.63 mK trap with 89% probability, and we further extend this loading to 100 atoms at 80% probability. The loading behavior agrees with a model of consecutive light-assisted collisions in repulsive molecular states. With simple rearrangement that only moves rows and columns of a 2D array, we demonstrate one example of the power of enhanced loading in large arrays., 6 pages, 3 figures

Atomic magnetometry is one of the most sensitive ways to measure magnetic fields. We present a method for converting a naturally scalar atomic magnetometer into a vector magnetometer by exploiting the polarization dependence of hyperfine transitions in rubidium atoms. First, we fully determine the polarization ellipse of an applied microwave field using a self-calibrating method, i.e. a method in which the light-atom interaction provides everything required to know the field in an orthogonal laboratory frame. We then measure the direction of an applied static field using the polarization ellipse as a three-dimensional reference defined by Maxwell's equations. Although demonstrated with trapped atoms, this technique could be applied to atomic vapors, or a variety of atom-like systems., 5 pages, 3 figures + supplementary 11 pages, 5 figure

Physical Review A, 95 (5), ISSN:1094-1622, ISSN:0556-2791, ISSN:1050-2947

Physical Review A, 92 (6), ISSN:1094-1622, ISSN:0556-2791, ISSN:1050-2947

Physical Review A, 90 (1), ISSN:1094-1622, ISSN:0556-2791, ISSN:1050-2947

Physical Review Letters, 108 (6), ISSN:0031-9007, ISSN:1079-7114