SAMOP 2023 – wissenschaftliches Programm
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QI: Fachverband Quanteninformation
QI 1: Quantum Technologies I (joint session Q/A/QI)
QI 1.2: Vortrag
Montag, 6. März 2023, 11:15–11:30, A320
Three-Dimensional Imaging of Single Atoms in an Optical Lattice via Helical Point-Spread-Function Engineering — •Tangi Legrand1, Falk-Richard Winkelmann1, Wolfgang Alt1, Dieter Meschede1, Andrea Alberti1, and Carrie Weidner2 — 1Institut für Angewandte Physik, Universität Bonn, Germany — 2Quantum Engineering Technology Laboratories, H. H. Wills Physics Laboratory and Department of Electrical and Electronic Engineering, University of Bristol, United Kingdom
Quantum gas microscopes can resolve atoms trapped in a 3D optical lattice down to the single site in the horizontal plane. Along the line of sight, however, a much lower resolution is achieved if the position is inferred from the defocus alone, although tomographic methods have been applied to extract this information [1]. However, phase-front engineering can be used to localize emitters in 3D with sub-micrometer resolution from a single experimental image [2]. The technique consists of shaping the imaging system’s point spread function (PSF) such that it results in an axially rotating azimuthally asymmetric distribution. By means of a spatial light modulator, we create a double-helix PSF consisting of two lobes whose relative angle encodes an atom’s axial position. We demonstrate 3D localization at the level of single lattice sites in a quantum gas microscope. As we show, the technique also features an increased depth of field. This method can find applications in other quantum gas experiments to extend the domain of quantum simulation from 2D to 3D. [1] O. Elíasson et al. Phys. Rev. A 102, 053311 (2020), [2] S.R.P. Pavani et al. PNAS 106, 2995 (2009).