Erlangen 2018 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 65: Nano-Optics and Biophotonics
Q 65.1: Vortrag
Freitag, 9. März 2018, 10:30–10:45, K 0.023
High resolution isotropic particle localization with a monolithic 4π parabolic mirror — •Lucas Alber1,2, Martin Fischer1,2, Florian Loosen1,2, Bharath Srivathsan1, Johannes Stehr2, Markus Sondermann1,2, and Gerd Leuchs1,2,3 — 1Max-Planck-Institute for the Science of Light, Erlangen, Germany — 2Institute of Optics, Information and Photonics (IOIP), Friedrich-Alexander University Erlangen-Nuremberg (FAU), Germany — 3Department of Physics, University of Ottawa, Canada
3D localization of single emitters forms the basis for high resolution localization microscopy. Localization is commonly done by imaging the emitter with a high-NA microscopic setup. In our work, we present the experimental demonstration of tracking a single trapped ion incorporating a monolithic parabolic mirror as the primary collection optic spanning almost 4π solid angle. Instead of imaging the emitter, we record the wavefront aberrations that are induced by displacements of the ion from the focal point of the mirror. For the measurement, we use a home-made single-photon sensitive Shack-Hartmann sensor that is based on a EMCCD camera. By moving the ion-trap mounted on a 3D translation piezo-stage, we can determine the tracking accuracy that amounts to a few tens of nanometer. Since we incorporate a 4π parabolic mirror, we are able to demonstrate a nearly isotropic 3D tracking resolution while at the same time we collect more than half of the photons emitted by the ion. The high 3D resolution and collection efficiency enables more accurate tracking of weak emitters embedded in a three-dimensional specimen.