R. A. Ganeev
Imperial College London, London SW7 2BW, UK
e-mail: r.ganeev@imperial.ac.uk
Received October 24, 2012
Abstract—This work reviews a series of investigations of different plasma plumes using single- and two-color
laser systems that emit femtosecond pulses with a 10-Hz repetition rate. Results of investigation of the resonant
enhancement of harmonics in tin plasma with the use of two types of pumps are analyzed, and it is shown that
the tuning of the wavelengths of harmonics to ion-resonance levels plays an important role in increasing the
conversion efficiency to high-order harmonics of the radiation to be converted. Investigations of different car-
bon-containing plasma media (carbon nanotubes, graphite, carbon aerogel, etc.) exhibit attractive properties of
the nonlinear medium of this type for efficient generation of high-order harmonics. The results of the first exper-
iments on the use of nanoparticles produced directly in the course of laser ablation of metals for increasing the
efficiency of harmonics generated in this cluster-containing medium are analyzed. It is shown that new
approaches realized in these investigations give hope that the nonlinear optical response of plasma media in the
far-ultraviolet range can be further increased.
10.1134/S0030400X13070059
Pleiades Publishing home page | journal home page | top
If you have any problems with this server, contact webmaster.