Single cycle thin film compressor opening the door to Zeptosecond-Exawatt physics G. Mourou, S. Mironov, E. Khazanov and A. Sergeev Eur. Phys. J. Special Topics, 223 6 (2014) 1181-1188 Published online: 04 June 2014 DOI: 10.1140/epjst/e2014-02171-5