Stuttgart 2012 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 35: Poster 2

Q 35.86: Poster

Mittwoch, 14. März 2012, 16:30–19:00, Poster.I+II

Efficient generation of squeezing by waveguided parametric downconversion — •Thomas Dirmeier1,2, Andreas Eckstein3, Nitin Jain1, Georg Harder3, Christoffer Wittmann1, Gerd Leuchs1, Christoph Marquardt1, and Christine Silberhorn31Max Planck Institute for the Science of Light, Guenther-Scharowsky-Str. 1, 91058 Erlangen, Germany — 2Institute for Optics Photonics and Information, University Erlangen-Nuremberg, Germany — 3Applied Physics, University of Paderborn, Warburgerstrasse 100, 33098 Paderborn, Germany

Biphoton sources based on parametric downconversion can be utilized as a reliable source of two-mode squeezed states with high brightness featuring reasonable squeezing values [1]. Modern continuous variable experiments, e.g. the generation of Schrödinger kitten states rely on such sources of the highest quality. Using a single-mode potassium-titanyl-phosphate waveguide in single-pass configuration, we provide a compact and robust source of two-mode squeezed states. To quantify the quality of the squeezed states, we study the spectral and quantum properties of frequency-degenerate signal and idler photons. Matching the temporal and spectral modes of the signal and idler photons with those of a coherent local oscillator, we seek to measure the resulting squeezing with a homodyne detection scheme.

[1] A.Eckstein, et al., Phys. Rev. Lett. 106, 013603 (2011)

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