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Experimental observation of anomalous high harmonics at low intensities

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Abstract

A variety of complex phenomena occurs when an ultra-short laser pulse interacts with atoms in the 1013 W/cm2 range: non-sequential ionisation, electron recollision, and Freeman resonances. We show that high-harmonic spectra obtained experimentally in this parameter range also display anomalous features, which are difficult to understand in the framework of the three-step, semiclassical model. The results of a systematic study of these high harmonics generated in argon, xenon, and krypton are presented. From the experimental curves, complex high-order harmonic generation phenomena are discussed.

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Authors and Affiliations

  1. Laboratoire d’Optique Appliquée, ENSTA – Ecole Polytechnique, Chemin de la Hunière, CNRS UMR 7639, 91761, Palaiseau, France

    C. Valentin, S. Kazamias, D. Douillet, G. Grillon, T. Lefrou, F. Augé, S. Sebban & P. Balcou

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  1. C. Valentin
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  2. S. Kazamias
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  3. D. Douillet
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  4. G. Grillon
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  5. T. Lefrou
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  6. F. Augé
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  7. S. Sebban
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  8. P. Balcou
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Correspondence to C. Valentin.

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PACS

42.65.Ky; 32.80.Rm

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Valentin, C., Kazamias, S., Douillet, D. et al. Experimental observation of anomalous high harmonics at low intensities. Appl Phys B 78, 845–849 (2004). https://doi.org/10.1007/s00340-004-1478-6

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  • DOI: https://doi.org/10.1007/s00340-004-1478-6

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