title: Full characterization of an attosecond pulse generated using an infrared driver.
abstract: The physics of attosecond pulse generation requires using infrared driving wavelength to reach the soft X-rays. However, with longer driving wavelength, the harmonic conversion efficiency drops significantly. It makes the conventional attosecond pulse measurement using streaking very difficult due to the low photoionization cross section in the soft X-rays region. In-situ measurement was developed for precisely this purpose. We use in-situ measurement to characterize, in both space and time, an attosecond pulse produced by ultrafast wavefront rotation of a 1.8 μm fundamental beam. We confirm what models suggest - that each beamlet is an isolated attosecond pulse in the time domain. We get almost constant flat wavefront curvature through the whole photon energy range. The measurement method is scalable to the soft X-ray spectral region.
authors.affiliation: Joint Attosecond Science Laboratory, University of Ottawa and National Research Council of Canada, 100 Sussex Dr, Ottawa K1A 0R6, Canada.
authors.forename: Chunmei
authors.initials: C
authors.lastname: Zhang
authors.affiliation: Joint Attosecond Science Laboratory, University of Ottawa and National Research Council of Canada, 100 Sussex Dr, Ottawa K1A 0R6, Canada.
authors.forename: Graham G
authors.initials: GG
authors.lastname: Brown
authors.affiliation: Centre for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju 500-712, South Korea.|Department of Physics and Photon Science, Gwangju Institute of Science and Technology (GIST), Gwangju 500-712, South Korea.
authors.forename: Kyung Taec
authors.initials: KT
authors.lastname: Kim
authors.affiliation: Joint Attosecond Science Laboratory, University of Ottawa and National Research Council of Canada, 100 Sussex Dr, Ottawa K1A 0R6, Canada.
authors.forename: D M
authors.initials: DM
authors.lastname: Villeneuve
authors.affiliation: Joint Attosecond Science Laboratory, University of Ottawa and National Research Council of Canada, 100 Sussex Dr, Ottawa K1A 0R6, Canada.
authors.forename: P B
authors.initials: PB
authors.lastname: Corkum