Mainz 2017 – scientific programme
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A: Fachverband Atomphysik
A 23: Trapped ions
A 23.8: Talk
Wednesday, March 8, 2017, 16:30–16:45, N 3
In-situ charge control of a silica optical nanofiber in an ion trap — •Benjamin Ames1, Johannes Ghetta1, Jan Petersen2, Philip Holtz1, Kirill Lakhmanskiy1, Michael Brownnutt3, Florian Ong1, Arno Rauschenbeutel2, Yves Colombe1, and Rainer Blatt1,4 — 1Institut für Experimentalphysik, University of Innsbruck, Innsbruck, Austria — 2TU Wien, Wien, Austria — 3University of Hong Kong, Pokfulam, Hong Kong — 4Institut für Quantenoptik und Quanteninformation, Innsbruck, Austria
A trapped ion confined within the evanescent field of an optical nanofiber could be a novel ion-photon interface for networking quantum information between registers. However, achieving the sub-micron ion-fiber distance required to observe coupling to the evanescent field remains problematic due to charges on the nanofiber surface. We report on in-situ techniques developed to mitigate the charge of the nanofiber. Using photoemission and anomalous field emission we are able to charge the fiber positively, while both positive and negative states can be obtained by means of electron flooding at different energies. These results can be applied to a variety of AMO experiments where charge control of dielectrics is desired.