Gräfe, M; Solntsev, Alexander; Keil, Robert; Sukhorukov, Andrey; Heinrich, Matthias; Tünnermann, Andreas; Nolte, Stefan; Szameit, A; Kivshar, Yuri
Quantum entanglement became essential in understanding the non-locality of quantum mechanics. In optics, this non-locality can be demonstrated on impressively large length scales, as photons travel with the speed of light and interact only weakly with their environment. Spontaneous parametric down-conversion (SPDC) in nonlinear crystals provides an efficient source for entangled photon pairs, so-called biphotons. However, SPDC can also be implemented in nonlinear arrays of evanescently coupled...[Show more]
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