Berlin 2014 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 38: Quantum information: Photons and nonclassical light I

Q 38.6: Vortrag

Donnerstag, 20. März 2014, 11:45–12:00, UDL HS3038

Heralded Photon-Pairs by Monolithically Integrated Cascaded Parametric Down-Conversion — •Stephan Krapick, Vahid Ansari, Benjamin Brecht, and Christine Silberhorn — Universität Paderborn, Integrierte Quantenoptik, Warburger Str. 100, D-33098 Paderborn

We report on a novel integrated approach for heralded pairs of photons, the generation of which is realized by cascading two parametric down-conversion processes on-chip. For the nonlinear optical conversion device, we implemented Ti-indiffused waveguide structures in lithium niobate, which are periodically poled with two different grating periods. From our measurements we extract the raw and dark-count corrected photon-triplet generation rate, and we analyze the heralding efficiency. Our results show the generation of photon-triplet states applicable for fundamental tests of quantum mechanics.

[1] Hübel et al., Nature 466, 601-603 (2010)

[2] Shalm et al., Nature Physics 9, 19-22 (2012)

[3] Krapick et al., New Journal of Physics 15, 033010 (2013)

[4] Krapick et al., submitted