Strong-field above-threshold ionization in laser-irradiated C$_{60}$: The signatures of orbital symmetry and intramolecular interference

We report about the results of our theoretical study of strong-field (multiphoton) above-threshold ionization (ATI) in laser-irradiated carbon fullerene molecule C$_{\mathrm{60}}$ under condition of relevant experiment [1]. The problem is addressed within the \textit{velocity-gauge} (VG) formulation of molecular \textit{strong-field approximation} (SFA) [2] essentially exploiting the \textit{density-functional-theory} (DFT) method for numerical composition of initial (laser-free) molecular state using the routines of GAUSSIAN-03 code [3]. The results of our present VG-SFA calculation for C$_{\mathrm{60}}$ photoelectron energy spectra (PES) demonstrate two distinct (well-separated) and pronounced local interference minima - in the low-energy and the high-energy domains of produced PES - both arising due to destructive \textit{intramolecular} (\textit{multislit}) quantum interference of strong-field ionization corresponding to photoelectron emission from multiple separate atomic centers.\\[4pt] [1] M. Tchaplyguine \textit{et al. } J. Chem. Phys. \textbf{112}, 2781 (2000)\\[0pt] [2] V. I. Usachenko \textit{et al.} Phys. Rev. A \textbf{79}, 023415 (2009)\\[0pt] [3] M. J. Frisch and J. A. Pople. \textbf{Gaussian-03, Revision A.1} (Gaussian, Inc., 2003 Pittsburgh, PA)