Rostock 2019 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 13: Quantum Optics and Photonics II

Q 13.2: Talk

Monday, March 11, 2019, 14:30–14:45, S Gr. HS Maschb.

Monolithically Integrated Hong-Ou-Mandel Experiment in LiNbO₃ — •Sebastian Brauner, Kai-Hong Luo, Christof Eigner, Polina Sharapova, Raimund Ricken, Torsten Meier, Harald Herrmann, and Christine Silberhorn — Department of Physics and CeOPP, University of Paderborn, Warburger Straße 100, 33098 Paderborn, Germany

One crucial requirement for future quantum computation and networks is to have a single physical substrate, which is capable to host all devices for various advanced functionalities without lowering the performance of the single devices. Here we present for the first time a fully integrated Hong-Ou-Mandel (HOM) interference circuit on LiNbO₃, which comprises photon pair state generation, passive routing, fast active polarization manipulation, electro-optic balanced switching and a variable time delay. By showing the functionality of each device separately and their successful synergy as a HOM-interferometer with a HOM-dip visibility of 93 %, we prove the suitability of integrated circuits on LiNbO₃ as a powerful platform for future quantum information processing, networking and sensing. Besides, we provide a detailed explanation of the working principle of the integrated electro-optically tunable delay line.