Power broadening effects on Electromagnetically Induced Transparency in   $^{20}$Ne vapor
  We report here the first observation of electromagnetically induced transparency (EIT) in $^{20}$Ne. The power broadening of the EIT linewidth is measured as a function of neon pressure and RF excitation power. Doppler effects on the EIT broadening are found even at low pressures and low intensities, where the linewidth should be governed only by homogeneous effects. 
Boaz Lubotzky, David Shwa, Tao Kong, Nadav Katz and Guy Ron
physics.optics physics.atom-ph quant-ph