HIGH HARMONIC GENERATION IN ATOMS AND DIATOMIC MOLECULES USING ULTRASHORT LASER PULSES IN THE MULTIPHOTON REGIME
| Autor: | Y. Beaudoin, Mohamed Chaker, S. Augst, Y Liang, See Leang Chin, P. A. Golovinski |
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| Rok vydání: | 1995 |
| Předmět: |
Materials science
Dye laser Physics and Astronomy (miscellaneous) Diatomic molecule Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Atmospheric-pressure laser ionization Polarizability Picosecond Ionization High harmonic generation Physics::Atomic Physics Atomic physics Ionization energy |
| Zdroj: | Journal of Nonlinear Optical Physics & Materials. :667-686 |
| ISSN: | 1793-6624 0218-8635 |
| DOI: | 10.1142/s021886359500029x |
| Popis: | High harmonic generation has been investigated in the diatomic molecular gases H 2, D 2, N 2 and O 2 as well as the atomic gases Ar and Xe using a linearly polarized picosecond dye laser (594 nm) and a linearly polarized subpicosecond Ti:sapphire/Nd:glass laser (1053 nm). It is shown that in the cutoff region, the ionization potential and mass are not sensitive parameters for harmonic efficiency but the polarizability is an important factor. A two-step model is suggested to explain the experimental observation in the multiphoton regime. The correlation of the high harmonic yield and the static polarizability for different systems with nearly the same ionization potentials is discussed. Comparison of theoretical estimation with experimental data shows a rather good agreement. |
| Databáze: | OpenAIRE |
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