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High-order harmonic generation in vibrating molecules

MPG-Autoren
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Chirila,  Ciprian C.
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society;

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Lein,  Manfred
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society;

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Zitation

Chirila, C. C., & Lein, M. (2006). High-order harmonic generation in vibrating molecules. Journal of Modern Optics, 53(1-2), 113-124. doi:10.1080/09500340500233636.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0011-869D-0
Zusammenfassung
The generation of high-order harmonics in small diatomic molecules is theoretically investigated with inclusion of the vibrational degree of freedom. The results obtained from the solution of the time-dependent Schrödinger equation for a model H2 molecule are interpreted by analysing the influence of the vibrational motion in the framework of the strong-field approximation. Ionization launches a vibrational wave packet whose motion is correlated with the motion of the continuum electron wave packet. The harmonics are sensitive to a correlation function quantifying the overlap between the vibrational wave packet at the time of recombination and a vibrational target wave packet, i.e. the wave packet for which de-excitation into the ground state is most likely. We show that more intense harmonics are generated in heavier isotopes due to the slower nuclear motion.