from relaxation to ionization*

Investigation of ultrafast dynamics of photoinduced processes in fullerene materials are valuable in applications from photovoltaics and photothermal therapy to quantum plasmonics. For the fundamental science, fullerenes are eminent “laboratory” to probe femtosecond electron relaxation upon a mid-UV photon absorption as well as plasmonic electron emission in attoseconds driven by an extreme-UV radiation. Recent results [1, 2] of our computational studies of these processes for C₆₀ will be covered in the talk. The plasmonic emission delay results are found in excellent conformity [2] with attosecond photoemission streaking measurements and probed the energy-differential plasmon dephasing mechanism. The relaxation results, on the other hand, should inspire ultrafast transient absorption or time-resolved photoelectron experiments. [1] Madjet et al., Phys. Rev. Lett. 126, 183002, (2021); [2] Biswas et al., (in review) preprint                arXiv:2111.14464 [physics.atom-ph] https://arxiv.org/abs/2111.14464