High harmonic generation in fullerene molecules

Using dynamical Hartree-Fock mean-field theory, we study the high harmonic generation (HHG) in fullerene molecules ${\mathrm{C}}_{60}$ and ${\mathrm{C}}_{70}$ under strong pump wave driving. We consider a strong-field regime show that output radiation exhibits multiple plateaus, whose borders are defined by molecular excitonic lines cutoff energies within each plateau scale linearly with field strength amplitude. In contrast to atomic cases for molecule, increase of photon energy is increased. also electron-electron interaction overall HHG rate suppressed. demonstrate molecule shows richer spectra stronger intensity than ${\mathrm{C}}_{60}$.