High-order harmonics from C60 fullerenes -toward attosecond dynamics of complex systems

We demonstrate, for the first time, high-order harmonic generation from C
₆₀
pumped by intense femtosecond Ti: sapphire laser. Laser-produced plasmas from C
₆₀
-rich epoxy and C
₆₀
films were used as the nonlinear media. Harmonics up to the 25
^th
order were observed. The harmonic yield from fullerene-rich plasma is about 25 times larger compared with those produced from bulk carbon target.