Sub-4-fs Charge Migration in Phenylalanine
Charge migration initiated by isolated attosecond pulses was experimentally observed in the amino-acid phenylalanine. An oscillatory pattern in the yield of a doubly-charged ion was measured with periods below 4.5-fs.
KeywordsProbe Pulse Attosecond Pulse Charge Dynamic Metallic Foil Density Matrix Formalism
We acknowledge support from ERC (grants no. 227355 ELYCHE and 290853 XCHEM), from LASERLAB-EUROPE (no. 284464), from European COST Action CM1204 XLIC, the MICINN Project FIS2010-15127, the ERA-Chemistry Project PIM2010EEC-00751, the European Grants MC-ITN CORINF and MC-RG ATTOTREND 268284, the UK’s STFC Laser Loan Scheme, the Eng. and Phys. Sciences Res. Council (grant EP/J007048/1), the Leverhulme Trust (RPG-2012-735), and the Northern Ireland Department of Employment and Learning.
- 1.J. Winkler et al, “Electron Transfer Through Proteins” in Bioelectronics, I. Willner, E. Katz, Eds. (Wiley-VCH, Weinheim, Germany, 2005), pp. 15-33.Google Scholar
- 2.L. S. Cederbaum, J. Zobeley, “Ultrafast charge migration by electron correlation,” Chem. Phys. Lett. 307, 205-210 (1999).Google Scholar
- 3.F. Remacle, R. D. Levine, “An electronic time scale in chemistry,” PNAS 103, 6793 (2006).Google Scholar
- 4.H. Hennig, J. Breidbach, L. S. Cederbaum, “Electron Correlation as the Driving Force for Charge Transfer: Charge Migration Following Ionization in N-Methyl Acetamide,” J. Phys. Chem. A 109, 409-414 (2005).Google Scholar
- 5.G. Sansone, E. Benedetti, F. Calegari, C. Vozzi, L. Avaldi, R. Flammini, L. Poletto, P. Villoresi, C. Altucci, R. Velotta, S. Stagira, S. De Silvestri, M. Nisoli, “Isolated Single-Cycle Attosecond Pulses,” Science 314, 443-446 (2006).Google Scholar
- 6.C.R. Calvert et al., “LIAD-fs scheme for studies of ultrafast laser interactions with gas phase biomolecules,” Phys. Chem Chem. Phys. 14, 6289-6297 (2012).Google Scholar
- 7.L. Belshaw, F. Calegari, M. J. Duffy, A. Trabattoni, L. Poletto, M. Nisoli, and J. B. Greenwood, “Observation of ultrafast charge migration in amino acid,” J. Phys. Chem. Lett. 3, 3751-3754 (2012).Google Scholar