Intense and stable high-order harmonics from carbon using the plasma harmonic method

We study high-order harmonic generation from plasma that are created from bulk carbon target. We obtained high-order harmonic energy in the multi-microjoule range for the 11th to the 17th harmonic. By analysing the target morphology and the plasma composition, we conclude that the intense harmonics from this bulk carbon target have the same origin as those from nanoparticles target.