Mainz 2017 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 11: Quantum Optics II
Q 11.3: Vortrag
Montag, 6. März 2017, 17:30–17:45, P 5
Highly efficient frequency conversion with bandwidth compression of quantum light — •Markus Allgaier1, Vahid Ansari1, Linda Sansoni1, Christof Eigner1, Viktor Quiring1, Raimung Ricken1, Georg Harder1, Benjamin Brecht1,2, and Christine Silberhorn1 — 1Integrated Quantum Optics, Applied Physics, University of Paderborn, 33098 Paderborn, Germany — 2Clarendon Laboratory, Department of Physics, University of Oxford, Oxford OX1 3PU, United Kingdom
Hybrid quantum networks rely on efficient interfacing of dissimilar quantum systems such as parametric down-conversion sources, quantum dots or atoms. However, these are are fundamentally different in frequency and bandwidth of their spectra. While optical pulse manipulation has been demonstrated in many different systems, there is none that combines efficient bandwidth compression and substantial frequency translation. Here, we present a device that achieves both goals using an engineered sum-frequency conversion process in Lithium Niobate. We show the conversion of pure photons at telecom wavelengths from a parametric down-conversion source to the visible range while compressing the spectral bandwidth by a factor of 7.47 under preservation of non-classical photon-number statistics. We achieve internal conversion efficiencies of 61.5 %. With external efficiencies of 16.5 % our experiment significantly outperforms spectral filtering; at the achieved bandwidths this represents a gain in efficiency of 26 %.