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We demonstrate highly efficient, multi-muJ high-order harmonic generation from plasma containing an abundance of nano-structured material, such as nanoparticles and fullerenes. We attribute this effect to harmonic generation from neutral atoms in such particles.
We demonstrate, for the first time, high-order harmonic generation from C60 pumped by intense femtosecond Ti: sapphire laser. Laser-produced plasmas from C60-rich epoxy and C60 films were used as the nonlinear media. Harmonics up to the 25th order were observed. The harmonic yield from fullerene-rich plasma is about 25 times larger compared with those produced from bulk carbon target.
We demonstrate, for the first time, high-order harmonic generation from C60 pumped by intense femtosecond Ti: sapphire laser. Laser-produced plasmas from C60-rich epoxy and C60 films were used as the nonlinear media. Harmonics up to the 19th order were observed. The harmonic yield from fullerene-rich plasma is about 25 times larger compared with those produced from bulk carbon target.
We demonstrate high-order harmonic generation from C60 fullerenes pumped by intense Ti:sapphire laser. We observe a 25 times increase in the harmonic yield compared with bulk carbon, near the 22 eV giant resonance of C60.
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