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Optimization of the focused flux of high harmonics

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Abstract.

Following the theoretical predictions [1], the observation of two-photon processes by interaction of vacuum ultraviolet (VUV) radiation with inner-shell levels of atoms requires focused intensities in the 1013-1014 W/cm2 range. Our aim is to reach this regime in order to study non-linear optics at these wavelengths. We first optimized the high harmonic conversion efficiency in argon by studying the best experimental conditions for phase-matching, concentrating on focus geometry related to laser energy, cell length and position relative to the focus. We then studied the resulting harmonic beam focusability by a toroidal mirror (f=10 cm) and made an image of the harmonic focus. We conclude with an evaluation of the focused intensity that we are able to reach experimentally.

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Authors and Affiliations

  1. Laboratoire d’Optique Appliquée, ENSTA-École Polytechnique(CNRS UMR 7639), 91761, Palaiseau Cedex, France

    S. Kazamias, D. Douillet, C. Valentin, Th. Lefrou, G. Grillon, G. Mullot, F. Augé, P. Mercére, Ph. Zeitoun & Ph. Balcou

  2. Laboratoire d’Interaction du rayonnement X avec la Matiére, Université Paris-Sud, bâtiment 350, 91405, Orsay Cedex, France

    P. Mercére & Ph. Zeitoun

Authors
  1. S. Kazamias
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  2. D. Douillet
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  3. C. Valentin
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  4. Th. Lefrou
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  5. G. Grillon
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  6. G. Mullot
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  7. F. Augé
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  8. P. Mercére
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  9. Ph. Zeitoun
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  10. Ph. Balcou
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Corresponding author

Correspondence to S. Kazamias.

Additional information

Received: 28 January 2003, Published online: 24 April 2003

PACS:

32.80.Rm Multiphoton ionization and excitation to highly excited states (e.g., Rydberg states) - 42.65.Ky Frequency conversion; harmonic generation, including higher-order harmonic generation

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Kazamias, S., Douillet, D., Valentin, C. et al. Optimization of the focused flux of high harmonics. Eur. Phys. J. D 26, 47–50 (2003). https://doi.org/10.1140/epjd/e2003-00083-y

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  • DOI: https://doi.org/10.1140/epjd/e2003-00083-y

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