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@INPROCEEDINGS{Kubullek:641201,
      author       = {Kubullek, Maximilian and Scheiba, Fabian and Silva Toledo,
                      Miguel Angel and de Queiroz Garcia, Rafael de and Mainz,
                      Roland E. and Rossi, Giulio Maria and Kärtner, Franz},
      title        = {{T}ailored and {E}nhanced {I}solated {A}ttosecond {P}ulses
                      in the {W}ater-{W}indow using a {P}arametric {W}aveform
                      {S}ynthesizer},
      reportid     = {PUBDB-2025-04932},
      year         = {2025},
      abstract     = {Isolated attosecond pulses (IAPs) generated via
                      high-harmonic generation (HHG) have emerged as one of the
                      most powerful tools for the study of ultrafast atomic and
                      molecular dynamics. Tailoring the HHG emission that is,
                      dynamically modifying their spectral content or temporal
                      shape for a specific experiment is difficult since it
                      requires exquisite control of the driving electric field
                      waveform on sub-cycle time scales. Here, we present tailored
                      IAP generation with enhanced efficiency using a two-channel
                      parametric waveform synthesizer, which can generate
                      precisely controlled sub-cycle pulses.[1] We are able to
                      show experimentally how minute changes in the waveform allow
                      us to enhance the HHG-efficiency and modify the spectral
                      content as well as the time domain structure of the IAPs in
                      the water-window (WW) spectral region.[2] Combined with our
                      novel in-situ waveform characterization technique [3], which
                      allows the measurement of the complete waveform driving HHG,
                      and our macroscopic HHG simulation tools, we can identify
                      the microscopic and macroscopic origins of the observed
                      efficiency enhancement and spectro-temporal tailoring of the
                      IAPs.As current ultrashort pulse generation schemes [4] are
                      reaching the sub-cycle limit, where HHG is highly sensitive
                      to fine waveform details, understanding HHG driven by
                      strongly non-sinusoidal fields is paramount for harnessing
                      the full capabilities of these sources in the next
                      generation of table-top HHG-based spectroscopy
                      experiments.[1] Rossi, Giulio Maria, et al. “Sub-cycle
                      millijoule-level parametric waveform synthesizer for
                      attosecond science.” Nature Photonics 14.10 (2020):
                      629-635.[2] Silva-Toledo Miguel-Angel et al. “Efficient
                      water-window isolated attosecond pulse generation with
                      tailored sub-cycle fields“, Atto Conference (2025)[3]
                      Kubullek, Maximilian, et al. "Complete Electric Field
                      Characterization of Ultrashort Multicolor Pulses." Ultrafast
                      Science 5 (2025): 0081.[4] Travers, John C., et al.
                      "High-energy pulse self-compression and ultraviolet
                      generation through soliton dynamics in hollow capillary
                      fibres." Nature Photonics 13.8 (2019): 547-554.},
      month         = {Oct},
      date          = {2025-10-20},
      organization  = {5th Scientific Workshop of the Program
                       MML, Karlsruhe (Germany), 20 Oct 2025 -
                       22 Oct 2025},
      cin          = {FS-CFEL-2},
      cid          = {I:(DE-H253)FS-CFEL-2-20120731},
      pnm          = {631 - Matter – Dynamics, Mechanisms and Control
                      (POF4-631) / AIM, DFG project G:(GEPRIS)390715994 - EXC
                      2056: CUI: Advanced Imaging of Matter (390715994)},
      pid          = {G:(DE-HGF)POF4-631 / G:(GEPRIS)390715994},
      experiment   = {EXP:(DE-H253)CFEL-Exp-20150101},
      typ          = {PUB:(DE-HGF)24},
      url          = {https://bib-pubdb1.desy.de/record/641201},
}