Phys. Rev. A 80, 033844 (2009) [10 pages]Photon-pair generation in random nonlinear layered structuresReceived 11 November 2008; published 28 September 2009 Nonlinearity and sharp transmission spectra of random one-dimensional nonlinear layered structures are combined together to produce photon pairs with extremely narrow spectral bandwidths. Indistinguishable photons in a pair are nearly unentangled. Also two-photon states with coincident frequencies can be conveniently generated in these structures if photon pairs generated into a certain range of emission angles are superposed. If two photons are emitted into two different resonant peaks, the ratio of their spectral bandwidths may differ considerably from one and two photons remain nearly unentangled. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.80.033844
DOI:
10.1103/PhysRevA.80.033844
PACS:
42.65.Lm, 42.50.Dv, 42.50.Ex, 42.25.Dd
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