@article {Moebius:767,
	title = {Efficient photon triplet generation in integrated nanophotonic waveguides},
	journal = {Optics Express},
	volume = {24},
	year = {2016},
	pages = {9932{\textendash}9954},
	abstract = {Generation of entangled photons in nonlinear media constitutes a basic building block of modern photonic quantum technology. Current optical materials are severely limited in their ability to produce three or more entangled photons in a single event due to weak nonlinearities and challenges achieving phase-matching. We use integrated nanophotonics to enhance nonlinear interactions and develop protocols to design multimode waveguides that enable sustained phase-matching for third-order spontaneous parametric down-conversion (TOSPDC). We predict a generation efficiency of 0.13 triplets/s/mW of pump power in TiO2-based integrated waveguides, an order of magnitude higher than previous theoretical and experimental demonstrations. We experimentally verify our device design methods in TiO2 waveguides using third-harmonic generation (THG), the reverse process of TOSPDC that is subject to the same phase-matching constraints. We finally discuss the effect of finite detector bandwidth and photon losses on the energy- time coherence properties of the expected TOSPDC source.},
	doi = {10.1364/OE.24.009932},
	url = {/files/mazur/files/rep_767.pdf},
	author = {M. Gerhard Moebius and F. Herrera and S. Griesse-Nascimento and O. Reshef and C. C. Evans and G. G. Guerreschi and A. n. Aspuru-Guzik and Mazur, E.}
}
