Düsseldorf 2007 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 61: Poster Quanteneffekte

Q 61.7: Poster

Thursday, March 22, 2007, 16:30–18:30, Poster C

Two photon interference of multimode waveguided parametric downconversion. — •Andreas Eckstein and Christine Silberhorn — Max-Planck-Nachwuchsgruppe Integrierte Quantenoptik, Erlangen, Deutschland

A typical bosonic property of light is two-photon bunching, i. e. the probability of two single photons taking the same path at a beamsplitter is higher than can be classically explained. This is known as HOM interference. To generate the required single photons, PDC is typically employed. Surprisingly, by superposition of different spectral modes, the reverse behavior can be induced: The photons are more likely to split up than classically predicted. We present the observation of the interaction of two spatial modes of an optical waveguide used for PDC in a HOM interference experiment leading to two-photon anti-bunching. We develop a theoretical model for this interaction and explore the feasibility of this tool to study the dispersion properties of the waveguide.