The Influence of Plasma Defocusing in High Harmonic Generation

  • Chien-Jen Lai
  • Kyung-Han Hong
  • Franz X. Kärtner
Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 125)

Abstract

We numerically investigate the influence of plasma defocusing in high harmonic generation (HHG) by solving the first-order wave equation in an ionized medium. To quantitatively analyze of the influence of plasma defocusing, we define an enhancement factor that considers the macroscopic propagation effects including phase-matching and reabsorption. While degrading the driver pulse intensity, plasma also has a strong impact on HHG phase-matching and efficiency. With the aid of the scaling relation between the single atom efficiency and the HHG driver wavelength, our results give an estimate of HHG efficiencies with different driver wavelengths and show a limited HHG efficiency in high density media.

Keywords

Enhancement Factor Geometric Phase High Harmonic Generation Retarded Time Free Electron Density 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

  1. 1.
    M.V. Ammosov, N.B. Delone, V.P. Krainov, Tunnel ionization of complex atoms and of atomic ions in an alternating electromagnetic field. Sov. Phys. JETP 64, 1191–1194 (1986)Google Scholar
  2. 2.
    M.C. Chen, P. Arpin, T. Popmintchev et al., Bright, coherent, ultrafast soft x-ray harmonics spanning the water window from a tabletop light source. Phys. Rev. Lett. 105, 173901 (2010)Google Scholar
  3. 3.
    E. Constant, D. Garzella, P. Breger et al., Optimizing high harmonic generation in absorbing gases: model and experiment. Phys. Rev. Lett. 82, 1668–1671 (1999)Google Scholar
  4. 4.
    E.L. Falcao-Filho, V.M. Gkortsas, A. Gordon et al., Analytic scaling of high harmonic generation conversion efficiency. Opt. Express 17, 11217–11229 (2009)Google Scholar
  5. 5.
    M. Geissler, G. Tempea, A. Scrinzi et al., Light propagation in field-ionizing media: extreme nonlinear optics. Phys. Rev. Lett. 83, 2930–2933 (1999)Google Scholar
  6. 6.
    E.J. Takahashi, Y. Nabekawa, K. Midorikawa, Low-divergence coherent soft x-ray source at 13 nm by high-order harmonics. Appl. Phys. Lett. 84, 4–6 (2004)Google Scholar
  7. 7.
    E.J. Takahashi, Y. Nabekawa, H. Mashiko et al., Generation of strong optical field in soft x-ray region by using high-order harmonics. IEEE J. Sel. Top Quantum. Electron. 10, 1315–1328 (2004)Google Scholar
  8. 8.
    E.J. Takahashi, T. Kanai, K.L. Ishikawa et al., Coherent water window X ray by phase-matched high-order harmonic generation in neutral media. Phys. Rev. Lett. 101, 253901 (2008)Google Scholar
  9. 9.
    J. Tate, T. Auguste, H.G. Muller et al., Scaling of wave-packet dynamics in an intense midinfrared field. Phys. Rev. Lett. 98, 013901 (2007)Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Chien-Jen Lai
    • 1
  • Kyung-Han Hong
    • 1
  • Franz X. Kärtner
    • 1
    • 2
  1. 1.Department of Electrical Engineering and Computer Science and Research Laboratory of ElectronicsMassachusetts Institute of TechnologyCambridgeUSA
  2. 2.Center for Free-Electron Laser Science, DESY, and Department of PhysicsUniversity of HamburgHamburgGermany

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