Physics – Quantum Physics
Scientific paper
2009-07-21
Phys. Rev. Lett. 103 (2009) 063902
Physics
Quantum Physics
4 pages, 3 figures
Scientific paper
Surface spontaneous parametric down-conversion is predicted as a consequence of continuity requirements for electric- and magnetic-field amplitudes at a discontinuity of chi2 nonlinearity. A generalization of the usual two-photon spectral amplitude is suggested to describe this effect. Examples of nonlinear layered structures and periodically-poled nonlinear crystals show that surface contributions to spontaneous down-conversion can be important.
Jan Perina Jr.
Haderka Ondrej
Luks Antonin
Scalora Michael
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