Stuttgart 2012 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 58: Photonik 3

Q 58.2: Talk

Friday, March 16, 2012, 11:00–11:15, V38.01

Fiber-coupled ion as a single photon source — Hiroki Takahashi, Andrew Riley-Watson, •Matthias Keller, and Wolfgang Lange — University of Sussex, Brighton, BN1 9QH, United Kingdom

We have realized a compact system combining an ion-trap with a pair of optical fibers. The fibers are tightly integrated in the center electrodes of a miniature endcap trap. In this way, we have coupled single photons emitted by the ion on demand to the two fibers. The total capture efficiency corresponds to 6% of the solid angle. The high collection efficiency and high signal-to-background ratio make the setup an ideal quantum light source. We have measured pulse shapes and second-order correlation function of the photons in the fiber. The system provides an interface between single-ion physics and photonics. It has a range of applications including single-ion spectroscopy, state detection in quantum information processing, strong coupling cavity-QED with ions and quantum repeaters.