Continuous-wave parametric conversion in hydrogenated amorphous photonic wire
نویسندگان
چکیده
We exploit the high χ nonlinearity present in hydrogenated amorphous silicon nanophotonic waveguides to demonstrate frequency conversion at telecommunication wavelengths using pump and signal that are both continuous-wave. We reach a frequency conversion efficiency close to -34dB having a on-chip 13mW pump power in a low-loss 1cm long silicon photonic wire. Thanks to the ultra-low pump power and optimised hydrogen concentration during fabrication, optical degradation during illumination was reduced. The nonlinear refractive index is estimated for a set of hydrogenated amorphous silicon waveguides with different hydrogen concentrations by the four-wave mixing process, yielding a maximum value of n2=5.76×10 m⁄W.
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