Evolving ultrafast electron dynamics in C<sub>60</sub> from relaxation to ionization

ORAL

Abstract

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

*National Science Foundation grant PHY-1806206 and PHY-2110318; BARTIK High-Performance Cluster at Northwest Missouri State University (National Science Foundation Grant No. CNS-1624416); National Science Foundational Grand No. OAC-1919789

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Publication: 1. "Ultrafast transfer and transient entrapment of photoexcited Mg electron in Mg@C60"; M.E. Madjet, E. Ali, M. Carignano, O. Vendrell, and H.S. Chakraborty, Phys. Rev. Lett. 126, 183002, (2021);
2. "Attosecond correlated electron dynamics at C60 giant plasmon resonance"; S. Biswas, A. Trabattoni, P. Rupp, M. Magrakvelidze, M.E. Madjet, U. De Giovannini, M.C. Castrovilli, M. Galli, Q. Liu, E.P. Månsson, J. Schoetz, V. Wanie, F. Legare, P. Wnuk, M. Nisoli, A. Rubio, H.S. Chakraborty, M.F. Kling, F. Calegari, (in review) preprint arXiv:2111.14464 [physics.atom-ph] https://arxiv.org/abs/2111.14464.
3. "Ultrafast nonadiabatic relaxation of C60 photoexcitations: a comparative study among exchange-correlation models"; E. Ali, M.E. Madjet, R. De, and H.S. Chakraborty, (in preparation).
4. "XUV-induced intrinsic time delay of plasmonic photoelectron production in C60"; M. Magrakvelidze, E.M. Madjet, and H.S. Chakraborty, (in preparation).

Presenters

  • Himadri Chakraborty

    • Northwest Missouri State University, Maryville, USA
    • Northwest Missouri State University

Authors

  • Himadri Chakraborty

    • Northwest Missouri State University, Maryville, USA
    • Northwest Missouri State University

  • Maia Magrakvelidze

    • Northwest Missouri State University, Maryville, USA & Cabrini University, Radnor, Pennsylvania, USA

  • Esam Ali

    • Northwest Missouri State University, Maryville, USA; University of Benghazi, Benghazi, Libya
    • Northwest Missouri State University, USA & University of Benghazi, Libya

  • Ruma De

    • Northwest Missouri State University, Maryville, USA
    • Northwest Missouri State University

  • Mohamed El-Amine Madjet

    • Northwest Missouri State University, Maryville, USA; University of Bremen, Bremen, Germany
    • Northwest Missouri State University, Maryville, USA & University of Bremen, Germany