Berlin 2014 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 38: Quantum information: Photons and nonclassical light I
Q 38.3: Talk
Thursday, March 20, 2014, 11:00–11:15, UDL HS3038
High purity single photons at 532 nm by means of up-conversion — •Axel Schönbeck1, Christoph Baune1, Aiko Samblowski1, Jaromír Fiurášek2, and Roman Schnabel1 — 1Albert-Einstein-Institut, Institut für Gravitationsphysik, Leibniz Universität Hannover, Callinstraße 38, D-30167 Hannover — 2Department of Optics, Palacký University, 17. listupadu 12, 77146 Olomouc, Czech Republic
Single photon states are of fundamental interest in quantum physics. Furthermore, the link between telecommunication and quantum memory wavelengths is useful in future quantum communication tasks. We connect these two wavelengths by up-conversion of single photons from 1550 nm to 532 nm while an ancilla photon at 810 nm triggers the detection. Frequency filtering of the signal mode leads to slightly smoothed out correlation functions. Finally, in a Hanbury Brown and Twiss setup we verified the single photon characteristics of the up-converted state.