Cited by 228Laser-Matter Interactions and ApplicationsAdvanced X-ray Imaging TechniquesTerahertz technology and applications

Carrier-envelope phase-dependent high harmonic generation in the water window using few-cycle infrared pulses

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Ishii, Nobuhisa, Kaneshima, Keisuke, Kitano, Kenta, Kanai, Teruto, Watanabe, Shuntaro, Itatani, Jiro·2014·Nature Communications

Abstract

High harmonic generation (HHG) using waveform-controlled, few-cycle pulses from Ti:sapphire lasers has opened emerging researches in strong-field and attosecond physics. However, the maximum photon energy of attosecond pulses via HHG remains limited to the extreme ultraviolet region. Long-wavelength light sources with carrier-envelope phase stabilization are promising to extend the photon energy of attosecond pulses into the soft X-ray region. Here we demonstrate carrier-envelope phase-dependent HHG in the water window using sub-two-cycle optical pulses at 1,600 nm. Experimental and simulated results indicate the confinement of soft X-ray emission in a single recombination event with a bandwidth of 75 eV around the carbon K edge. Control of high harmonics by the waveform of few-cycle infrared pulses is a key milestone to generate soft X-ray attosecond pulses. We measure a dependence of half-cycle bursts on the gas pressure, which indicates subcycle deformation of the waveform of the infrared drive pulses in the HHG process. The higher-harmonic generation of laser pulses is used to achieve short-wavelength attosecond pulses for ultrashort experiments, but has been limited in the achievable energy. Here, Ishii et al. develop a scheme to break this barrier and to achieve photon energies higher than the carbon Kedge of about 284 eV.

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  • With OPA/OPCPA sources, half-cycle cut-offs in the water window spectral range have been observed, confirming generation of isolated attosecond x-ray pulses in the water window.

    “With these OPA/OPCPA sources, half-cycle cut-offs in the water window spectral range have been observed, confirming the generation of isolated attosecond x-ray pulses in the water window [155,156].”

    From Roadmap of ultrafast x-ray atomic and molecular physics (2018) · cites this paper as [155]

  • OPCPA pumped by Ti-Sa lasers is another approach to generate CEP stabilized few-cycle pulses in this spectral range.

    “Another approach to generate CEP stabilized few-cycle pulses in this spectral range is through optical parametric chirped-pulse amplification (OPCPA), pumped by Ti-Sa lasers [155].”

    From Roadmap of ultrafast x-ray atomic and molecular physics (2018) · cites this paper as [155]

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Authors
Ishii, N., Kaneshima, K., Kitano, K., Kanai, T., Watanabe, S., & Itatani, J.
Affiliations
  • The Institute for Solid State Physics, The University of Tokyo (JP)
  • Tokyo University of Science (JP)
Corresponding author
Ishii, Nobuhisa
Venue
Nature Communications
Published
2014-02-18
Volume
5
Issue
1
Pages
3331-3331
ISSN
2041-1723 (ISSN-L)
OpenAlex
W2036781067
Cited by
228
References
36
Citations by year
2026: 10 · 2025: 13 · 2024: 10 · 2023: 16 · 2022: 24 · 2021: 15 · 2020: 24 · 2019: 18 · 2018: 18 · 2017: 31 · 2016: 23 · 2015: 20 · 2014: 6
FWCI
13.27
Type
journal article
Language
en
Open access
Locations
  • Nature Communications (publishedVersion, cc-by-nc-nd)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
Funders
  • Ministry of Education, Culture, Sports, Science and Technology
  • Japan Society for the Promotion of Science (24246022, 25790063, 23226003)
Topics
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Laser-Matter Interactions and Applications
  • Physical Sciences › Physics and Astronomy › Radiation › Advanced X-ray Imaging Techniques
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Terahertz technology and applications
Keywords
high harmonic generation, carrier-envelope phase, water window, carbon K-edge, waveform control, gas pressure dependence, attosecond spectroscopy

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