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Harmonic generation by atoms in circularly polarized laser fields: far-off and near resonance regimes

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Abstract

The generation of harmonics by atoms interacting with two laser fields having coplanar circular polarizations and an integral frequency ratio is addressed through ab initio numerical simulations. A detailed characterization of a few specific harmonics is given. In particular, the two different cases where the total energy absorbed through photons is far off or close to the energy gap between different atomic states are investigated. It is found that the conversion efficiency in the harmonic generation is strongly dependent on the inner atomic structure and in certain specific cases it can be significantly enhanced within a small frequency range.

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Authors and Affiliations

  1. Istituto Nazionale per la Fisica della Materia (INFM), sez. A, Dipartimento di Fisica ‘Enrico Fermi’, Università di Pisa, Via F. Buonarroti 2, 56127, Pisa, Italy

    F. Ceccherini, N. Davini & F. Cornolti

  2. Max-Born-Institut, Max-Born-Str. 2a, 12489, Berlin, Germany

    D. Bauer

Authors
  1. F. Ceccherini
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  2. N. Davini
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  3. D. Bauer
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  4. F. Cornolti
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Correspondence to F. Ceccherini.

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42.50.Hz; 42.65.Ky

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Ceccherini, F., Davini, N., Bauer, D. et al. Harmonic generation by atoms in circularly polarized laser fields: far-off and near resonance regimes. Appl Phys B 78, 851–854 (2004). https://doi.org/10.1007/s00340-004-1458-x

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  • DOI: https://doi.org/10.1007/s00340-004-1458-x

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