Mainz 2017 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 40: Poster: Quantum Optics and Photonics II
Q 40.29: Poster
Mittwoch, 8. März 2017, 17:00–19:00, P OG2
Progress report towards a portable 27Al+ optical clock — •Stephan Hannig1, Nils Scharnhorst1, Johannes Kramer1, Lennart Pelzer1, Stepanova Mariia1, Leroux Ian D.3, Tanja E. Mehlstäubler1, and Piet O. Schmidt1,2 — 1Physikalisch-Technische Bundesanstalt, 38116 Braunschweig, Germany — 2Leibniz Universität Hannover, 30167 Hannover, Germany — 3National Research Council Canada, 1200 Ottawa, Canada
We present the status of our aluminium ion optical clock using quantum logic techniques for cooling and reading out the clock ion. The design goals for the frequency standard are an inaccuracy below 10−17 and relative instability better than 10−15 in one second. 27Al+ provides a narrow (8 mHz) clock transition at 267 nm which exhibits no electric quadrupole shift and a low sensitivity to black-body radiation. A single 27Al+ ion will be confined in a linear Paul Trap together with a 40Ca+ logic ion. The latter is used for sympathetic cooling and internal state detection of the clock ion via Coulomb interaction.
A second generation, new vacuum chamber and complete Ca+ laser system have been set up, partly using fiberized components to feature miniaturization and thereby portability. The chamber includes a segmented multi-layer linear Paul trap. This design enables the implementation of multi-ensemble, multi-ion clock protocols which can advance the stability of ion-based optical clocks.
We will use such a transportable optical clock for aplications such as relativistic geodesy.