Interaction of independent single photons based on integrated nonlinear optics

Barbosa Dos Santos Guerreiro, Thiago; Pomarico, Enrico; Sanguinetti, Bruno; Sangouard, Nicolas Bruno; Pelc, J. S.; Langrock, C.; Fejer, M. M.; Zbinden, Hugo; Thew, Rob; Gisin, Nicolas

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Title		Interaction of independent single photons based on integrated nonlinear optics
Authors		Barbosa Dos Santos Guerreiro, Thiago Pomarico, Enrico Sanguinetti, Bruno Sangouard, Nicolas Bruno Pelc, J. S. Langrock, C. Fejer, M. M. Zbinden, Hugo Thew, Rob Gisin, Nicolas show all authors [1 - 10]
Published in		Nature Communications. 2013, vol. 4
Abstract		The parametric interaction of light beams in nonlinear materials is usually thought to be too weak to be observed when the fields involved are at the single-photon level. However, such single-photon level nonlinearity is not only fundamentally fascinating but holds great potential for emerging technologies and applications involving heralding entanglement at a distance. Here we use a high-efficiency waveguide to demonstrate the sum-frequency generation between a single photon and a single-photon level coherent state. The use of an integrated, solid state, room temperature device and telecom wavelengths makes this type of system directly applicable to future quantum communication technologies such as device-independent quantum key distribution.
Keywords		Physical sciences — Optical physics
Identifiers		DOI: 10.1038/ncomms3324
Full text		Article (Published version) (430 Kb) - Free access
Structures		Faculté des sciences / Section de physique / Groupe de physique appliquée
Citation (ISO format)		BARBOSA DOS SANTOS GUERREIRO, Thiago et al. Interaction of independent single photons based on integrated nonlinear optics. In: Nature Communications, 2013, vol. 4. https://archive-ouverte.unige.ch/unige:36528