Erlangen 2018 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 69: Post-Deadline Session

Q 69.3: Talk

Friday, March 9, 2018, 11:00–11:15, K 1.020

Correlated photon-pair emission from a cw-pumped Fabry-Perot microcavity — •Thorsten F. Langerfeld, Hendrik M. Meyer, and Michael Köhl — Physikalisches Institut, Universität Bonn, Wegelerstraße 8, D-53115 Bonn, Germany

The generation of correlated photons is an important milestone in fundamental test of quantum mechanics and in the quest to interconnect remote quantum systems with the goal of creating quantum networks. For the latter, a tunable photon pair source, which can be tailored to the physical properties of the network nodes is desirable. For that purpose, we study a dispersion-compensated high-finesse optical Fabry-Perot microcavity under high-intensity cw pumping. The Kerr non-linearity in the optical coatings causes a spontaneous four-wave mixing process, triggered by vacuum fluctuations of the unoccupied cavity modes, which leads to the emission of time-correlated photon pairs, which are shifted in frequency by ±1 free spectral range relative to the pump frequency. The ease of the experimental setup, e.g. avoiding a phase matching condition by employing a sub-wavelength thick nonlinear medium, and the principal tunability of the wavelengths and bandwidths of the created photon pair make the scheme an attractive candidate for a photon-pair source with application in hybrid quantum systems in which wavelength has to be bridged between dissimilar systems.