Dresden 2011 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 53: Quantum Information: Photons and Nonclassical Light 1
Q 53.2: Talk
Thursday, March 17, 2011, 14:45–15:00, SCH 251
Testing spectral modes in parametric downconversion — •Malte Avenhaus1, Andreas Christ2, Katiúscia N. Cassemiro1, and Chrstine Silberhorn1,2 — 1Max-Planck Institute for the Science of Light, Erlangen, Germany — 2University of Paderborn, Applied Physics, Paderborn, Germany
Parametric downconversion has found wide application in quantum optics. Great effort has recently been attributed to generate states with either a very large number of modes, or to design PDC sources that work in the single mode regime. While the first approach offers a large extent of spectral entanglement, the latter can be used to implement pure heralded single photon sources.
For characterizing these sources recent focus was based on gaining an operational value that estimates the number of modes from specific measurements on the output state. Here, we focus on a way to directly access the spectral structure of the modes generated, by seeding the source with a spectrally shaped coherent beam.