Imad Agha, Serkan Ates, Marcelo Davanco, Kartik Srinivasan
We describe a chip-scale frequency conversion interface designed for connecting photons generated by single quantum emitters to the 1550 nm telecommunications band. Four-wave-mixing Bragg scattering in silicon nitride waveguides is used to demonstrate frequency upconversion and downconversion between the 980 nm and 1550 nm wavelength regions, with signal-to-background levels > 10. Finite element simulations and the split-step Fourier method are used to develop waveguide designs that can connect shorter wavelength (637 nm to 852 nm) quantum emitters with 1550 nm. Finally, the conditions for achieving the conversion efficiencies needed for practical demonstrations of frequency conversion of quantum states of light are discussed.
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http://arxiv.org/abs/1304.5754
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