Toward sub-femtosecond pump-probe experiments : A dispersionless autocorrelator with attosecond resolution E. Constant, E. Mével, A. Zaïr, V. Bagnoud and F. Salin J. Phys. IV France, 11 PR2 (2001) Pr2-537-Pr2-540 DOI: 10.1051/jp4:20012105