Hannover 2013 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 68: Quantum information: Photons and nonclassical light II

Q 68.1: Talk

Friday, March 22, 2013, 14:00–14:15, F 142

Interfacing UV and telecommunication wavelengths — •Helge Rütz, Hubertus Suche, and Christine Silberhorn — Universität Paderborn, Integrierte Quantenoptik, Warburger Str. 100, D-33098 Paderborn

While trapped ions and other promising candidates for stationary qubit systems in quantum information applications can only be addressed in the UV and visible spectral region, efficient long distance photonic state transfer is restricted to telecommunication wavelengths. This spectral gap can however be bridged by Frequency Conversion.

Here, we focus on a coherent Frequency Conversion interface for quantum states of light between trapped ions at 369.5 nm and telecommunication wavelengths around 1310 nm. A single-pass quasi-phasematched second-order nonlinear interaction with a strong cw-pump field at 515 nm in a periodically poled waveguide allows for the upconversion of infrared- as well as the downconversion of UV-light. Conceptual and experimental details of this interface are given and its potential for quantum information technology is discussed.