
April 24, 2014 17:34 PSP Book - 9in x 6in 04-Rashid-A.-Ganeev-c04
Chapter 4
High-Order Harmonic Generation in
Plasma Plumes Using Picosecond Pulses
Earliest observations of the HHG in gases were reported using the
picosecond lasers [1–3]. The harmonics from different gases up to
the 21st and 33rd orders of 1064 nm radiation were reported at the
intensities of 3 ×10
13
W/cm
2
, which led to the enormous growth of
the interest in this area of nonlinear optics. The studies described
in this chapter demonstrate that application of ablated plasma
as a nonlinear medium can further amend this HHG technique
using picosecond driving pulses, once the atoms, ions, and ...