Low-power continuous-wave four-wave mixing wavelength conversion in   AlGaAs-nanowaveguide microresonators
  We experimentally demonstrate enhanced wavelength conversion in a Q=7500 deeply etched AlGaAs-nanowaveguide microresonator via degenerate continuous-wave four-wave mixing with a pump power of 24 mW. The maximum conversion efficiency is -43 dB and accounts for 12 dB enhancement compared to that of a straight nanowaveguide. The experimental results and theoretical predictions agree very well and show optimized conversion efficiency of -15 dB. This work represents a step toward realizing a fully integrated optical devices for generating new optical frequencies. 
Pisek Kultavewuti, Vincenzo Pusino, Marc Sorel and J. Stewart   Aitchison
physics.optics