High-order harmonics from C<inf>60</inf> fullerenes -toward attosecond dynamics of complex systems
Аннотация
We demonstrate, for the first time, high-order harmonic generation from C <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">60</sub> pumped by intense femtosecond Ti: sapphire laser. Laser-produced plasmas from C <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">60</sub> -rich epoxy and C <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">60</sub> films were used as the nonlinear media. Harmonics up to the 25 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">th</sup> order were observed. The harmonic yield from fullerene-rich plasma is about 25 times larger compared with those produced from bulk carbon target.