Stuttgart 2012 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 12: Quanteninformation: Photonen und nichtklass. Licht

Q 12.4: Vortrag

Montag, 12. März 2012, 14:45–15:00, V7.02

Doubly resonant, narrowband photon pair source based on parametric down-conversion in a Ti:PPLN waveguide cavity — •Kai-Hong Luo, Harald Herrmann, Wolfgang Sohler, and Christine Silberhorn — Integrated Quantum Optics, Applied Physics, University of Paderborn, Warburger Straße 100, 33098 Paderborn, Germany

Narrowband photon pair sources have received considerable attention for future applications in quantum information, computing and communication. We present an integrated, resonantly enhanced, non-degenerated photon pair source based on spontaneous parametric down conversion (SPDC). The source consists of a Ti-indiffused periodically poled lithium niobate (PPLN) waveguide and two dielectric mirrors with high reflectivity deposited on the end-face of the waveguide. Theoretical studies were performed with the emphasis to design a narrowband source. Due to simultaneous resonance for both signal and idler photons, the parametric radiation is spectrally narrowed (in the ideal case down to single mode emission). We present details on the optimum design of such sources including a comparison between type I and type II-phase-matched processes. First experimental results towards the realization of such a source are discussed as well.