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Optical emulation of photon-pair generation in nonlinear lossy waveguides

: Gräfe, M.; Antonosyan, D.A.; Solntsev, A.S.; Sukhorukov, A.A.; Szameit, A.


epl. A letters journal exploring the frontiers of physics 118 (2017), Nr.5, Art.54001, 6 S.
ISSN: 0302-072X
ISSN: 0295-5075
ISSN: 1286-4854
Fraunhofer IOF ()

We establish theoretically and demonstrate experimentally that photon-pair generation through spontaneous parametric down-conversion in a nonlinear waveguide with scattering or material losses can be effectively emulated by classical laser light propagation through a specially designed linear waveguide circuit. This platform can represent arbitrary photon and pump losses, with a potential for the emulation of non-Markovian decay. We characterize the photon-pair correlation spectrum and observe its characteristic transformation from the well-known sinc-shape in lossless waveguides towards a Lorentzian shape in the presence of photon loss.