Abstract
Random nonlinear layered structures have been found to be a useful source of photon pairs with perfectly indistinguishable un-entangled photons emitted into a very narrow spectral range. Localization of the interacting optical fields typical for random structures gives relatively high photon-pair fluxes. By superposing photon-pair emission quantum paths at different emission angles, several kinds of twophoton states (including states with coincident frequencies) useful in quantum-information processing can easily be generated.
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Peřina, J., Centini, M., Sibilia, C. et al. Random nonlinear layered structures as sources of photon pairs for quantum-information processing. J Russ Laser Res 30, 508–513 (2009). https://doi.org/10.1007/s10946-009-9104-z
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DOI: https://doi.org/10.1007/s10946-009-9104-z