[1] RIKEN, Theoret Quantum Phys Lab, Wako, Saitama 3510198, Japan
[2] Ctr Excellence ENSEMBLE3 Sp Zoo, PL-01919 Warsaw, Poland
[3] Donostia Int Phys Ctr DIPC, Donostia San Sebastian 20080, Spain
[4] Univ Ottawa, Dept Phys, Ottawa, ON K1N 6N5, Canada
[5] Univ Glasgow, Dept Phys & Astron, Glasgow G12, Scotland
[6] Aix Marseille Univ, Inst Fresnel, CNRS, Cent Marseille, Marseille, France
[7] Univ Rochester, Inst Opt, Rochester, NY 14527 USA
[8] Univ Birmingham, Sch Phys & Astron, Birmingham, England
[9] Univ Witwatersrand, Sch Phys, Private Bag 3, ZA-2050 Johannesburg, South Africa
[10] Univ Maryland, Inst Res Elect & Appl Phys, College Pk, MD 20740 USA
[11] Vienna Univ Technol TU Wien, Inst Theoret Phys, A-1040 Vienna, Austria
[12] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA
[13] Penn State Univ, Mat Res Inst MRI, University Pk, PA 16802 USA
[14] Penn State Univ, Dept Engn Sci & Mech, University Pk, PA 16802 USA
[15] Yale Univ, Dept Appl Phys, New Haven, CT USA
[16] CNR, Joint Attosecond Sci Lab, Ottawa, ON, Canada
[17] Univ Ottawa, Ottawa, ON, Canada
[18] Univ Salamanca, Dept Fis Aplicada, Grp Invest Aplicac Laser & Foton, E-37008 Salamanca, Spain
[19] Monash Univ, Sch Phys & Astron, Melbourne, Vic 3800, Australia
[20] Australian Natl Univ, Res Sch Phys, Canberra, ACT 2601, Australia
[21] Univ Lisbon, Inst Telecomunicacoes, Inst Super Tecn, Lisbon, Portugal
[22] Univ Penn, Dept Elect & Syst Engn, Philadelphia, PA 19104 USA
[23] Humboldt Univ, Dept Phys, D-12489 Berlin, Germany
[24] Natl Univ Singapore, Ctr Quantum Technol, 3 Sci Dr 2, Singapore 117543, Singapore
[25] Technion Israel Inst Technol, Russell Berrie Nanotechnol Inst, IL-3200003 Haifa, Israel
[26] Technion Israel Inst Technol, Helen Diller Quantum Ctr, IL-3200003 Haifa, Israel
[27] Shanghai Jiao Tong Univ, 800 Dongchuan RD, Shanghai, Peoples R China
[28] Kings Coll London, Dept Phys, London WC2R 2LS, England
[29] Kings Coll London, London Ctr Nanotechnol, London WC2R 2LS, England
[30] Barcelona Inst Sci & Technol, ICFO Inst Ciencies Foton, Castelldefels, Barcelona, Spain
[31] Tongji Univ, Ctr Phonon & Thermal Energy Sci, Sch Phys Sci & Engn, Shanghai 200092, Peoples R China
[32] CUNY City Coll, Dept Elect Engn, 160 Convent Ave, New York, NY 10031 USA
[33] CUNY, Adv Sci Res Ctr, Photon Initiat, New York, NY 10031 USA
[34] CUNY, Grad Ctr, Phys Program, New York, NY 10031 USA
[35] Univ Bordeaux, CNRS, UMR 5798, LOMA, F-33400 Talence, France
[36] Univ Antwerp, Electron Microscopy Mat Sci EMAT, B-2020 Antwerp, Belgium
[37] Vienna Univ Technol TU Wien, A-1040 Vienna, Austria
[38] Univ Waterloo, Dept Phys & Astron, Waterloo, ON N2L 3G1, Canada
[39] Technion Israel Inst Technol, Dept Elect & Comp Engn, IL-3200003 Haifa, Israel
[40] Technion Israel Inst Technol, Solid State Inst, IL-3200003 Haifa, Israel
[41] Univ Napoli Federico II, Complesso Univ Monte S Angelo, Dipartimento Fis Ettore Pancini, I-80126 Naples, Italy
[42] Max Planck Inst Sci Light, Erlangen, Germany
[43] Univ Buffalo, State Univ New York, Dept Phys, Buffalo, NY 14260 USA
[44] Univ Waterloo, Dept Chem, Waterloo, ON N2L 3G1, Canada
[45] Univ Waterloo, Inst Quantum Comp, Waterloo, ON N2L 3G1, Canada