title: Attosecond streaking measurement of extreme ultraviolet pulses using a long-wavelength electric field.
abstract: Long-wavelength lasers have great potential to become a new-generation drive laser for tabletop coherent light sources in the soft X-ray region. Because of the significantly low conversion efficiency from a long-wavelength light field to high-order harmonics, their pulse characterization has been carried out by measuring the carrier-envelope phase and/or spatial dependences of high harmonic spectra. However, these photon detection schemes, in general, have difficulty in obtaining information on the spectral phases, which is crucial to determine the temporal structures of high-order harmonics. Here, we report the first attosecond streaking measurement of high harmonics generated by few-cycle optical pulses at 1.7 μm from a BiB3O6-based optical parametric chirped-pulse amplifier. This is also the first demonstration of time-resolved photoelectron spectroscopy using high harmonics from a long-wavelength drive laser other than Ti:sapphire lasers, which paves the way towards ultrafast soft X-ray photoelectron spectroscopy.
authors.affiliation: The Institute for Solid State Physics, The University of Tokyo, Kashiwanoha 5-1-5, Kashiwa, Chiba 277-8581, Japan.
authors.forename: Nariyuki
authors.initials: N
authors.lastname: Saito
authors.affiliation: The Institute for Solid State Physics, The University of Tokyo, Kashiwanoha 5-1-5, Kashiwa, Chiba 277-8581, Japan.
authors.forename: Nobuhisa
authors.initials: N
authors.lastname: Ishii
authors.affiliation: The Institute for Solid State Physics, The University of Tokyo, Kashiwanoha 5-1-5, Kashiwa, Chiba 277-8581, Japan.
authors.forename: Teruto
authors.initials: T
authors.lastname: Kanai
authors.affiliation: Research Institute for Science and Technology, Tokyo University of Science, Yamasaki 2641, Noda, Chiba 278-8510, Japan.
authors.forename: Shuntaro
authors.initials: S
authors.lastname: Watanabe
authors.affiliation: The Institute for Solid State Physics, The University of Tokyo, Kashiwanoha 5-1-5, Kashiwa, Chiba 277-8581, Japan.
authors.forename: Jiro
authors.initials: J
authors.lastname: Itatani