Hannover 2016 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 47: Quantum Information: Quantum Computing and Communication I
Q 47.4: Vortrag
Donnerstag, 3. März 2016, 11:45–12:00, e214
High-rate source of Ca+-resonant heralded single photons — •Stephan Kucera, Jan Arenskötter, Pascal Eich, Matthias Kreis, Philipp Müller, and Jürgen Eschner — Experimentalphysik, Universität des Saarlandes, Saarbrücken, Germany
We present a source of heralded single photons for quantum communication experiments with single trapped 40Ca+ ions [1]. The photons are generated at 854 nm wavelength by cavity-enhanced spontaneous parametric down conversion in a doubly resonant bow-tie resonator. In 10 MHz cavity line-width we achieve a fiber-coupled brightness of 4·104 /(s · mW) ion-resonant photons, about 500 times more than without resonator [2]. Compatibility with the ion resonance is demonstrated by correlation, coherence, and absorption measurements.
[1] Kurz et al., Nat. Commun. 5, 5527 (2014)
[2] Piro et al., Nat. Phys. 7, 17 (2011)