Heidelberg 2015 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 49: Quantum Effects: Cavity QED I

Q 49.6: Talk

Thursday, March 26, 2015, 12:30–12:45, B/gHS

Towards Strong Coupling of Single Ions to an Optical Cavity — •Ezra Kassa, Hiroki Takahashi, and Matthias Keller — University of Sussex, Department of Physics and Astronomy, Pevensey 2, Falmer, Brighton East Sussex, United Kingdom BN1 9QH

In our aim to pave the way towards cavity-QED based quantum network interfaces with trapped ions, we have developed a miniature endcap trap with a tightly integrated fibre cavity [1]. This allowed us to bring the cavity length to below 300 um. We have produced fibre cavities with finesses of up to 60,000 by CO2 laser machining [2]. We have successfully trapped single Ca+ ions in close vicinity of fibre ends and will couple them to the optical fiber cavity to implement a coherent ion-photon interface through strongly coupled cavity-QED.

[1] Takahashi et. al, An integrated fiber trap for single-ion photonics, New J. Phys. 15 053011 (2013)

[2] Takahashi et. al, Novel laser machining of optical fibers for long cavities with low birefringence, accepted by Optics Express