1. Laboratory for Laser Energetics, University of Rochester, 250 E. River Road, Rochester, New York 14623, USA
2. Gérard Mourou Center for Ultrafast Optical Science, University of Michigan, 2200 Bonisteel Boulevard, Ann Arbor, Michigan 48109, USA
3. Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550, USA