
April 25, 2014 15:23 PSP Book - 9in x 6in 07-Rashid-A.-Ganeev-c07
Ablation of Nanoparticles and Efficient Harmonic Generation Using 1 kHz Laser 263
Applications of ablated nanoparticles for enhancement of HHG were
confirmed in many laboratories ([51–53], see also the review of
those studies [54]). The reported improvement in η using various
metal clusters showed the attractiveness of this approach.
These plasma HHG studies of clustered media were carried out
using relatively low (10 Hz) pulse repetition rate lasers. The problem
of maintaining the stable plasma plume containing nanoparticles
was a main obstacle of this technique. In the meantime, the