Stuttgart 2012 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 12: Quanteninformation: Photonen und nichtklass. Licht
Q 12.7: Talk
Monday, March 12, 2012, 15:30–15:45, V7.02
An efficient source of continuously tunable heralded single photons — •Michael Förtsch1,2, Josef Fürst1,2, Christoffer Wittmann1,2, Dmitry Strekalov1,3, Andrea Aiello1,2, Christine Silberhorn1, Christoph Marquardt1,2, and Gerd Leuchs1,2 — 1Max Planck Institut für die Physik des Lichts — 2Institut für Optik, Information und Photonik, Universität Erlangen-Nürnberg — 3Jet Propulsion Laboratory, California Institute of Technology, Pasadena
Single photon sources are a key-element in quantum information processing. To be compatible with different atomic transitions, ideally one requires a single photon source that is widely tunable, compact, stable and still efficient. We developed for the first time a narrow-band heralded single photon source, which is readily tunable in wavelength and bandwidth and efficient at once. This source is realized using a crystalline whispering gallery mode resonator with high quality factor operated far below the pump threshold of the comparable optical parametric oscillator (OPO). The variable evanescent resonator coupling in combination with the tunable phase matching conditions give us the freedom to adjust the bandwidth and the wavelength of the emitted photon pairs.