Chirp effect on the kinetic energy release upon dissociation of H$_{2}^{+}$ in intense ultrashort laser pulses

ORAL

Abstract

The effect of chirp on the kinetic energy release (KER) of the vibrational states of H$_{2}^{+}$ was measured using a coincidence 3D momentum imaging technique. The data shows significant shifts of the KER peaks associated with the dissociating vibrational levels in intense 70 and 120 fs pulses chirped positively/negatively from the 30 fs transform limited pulses. Our calculations show that this energy shift is due to the dissociation of the H$_{2}^{+}$ early in the pulse -- when the photon energy is shifted to either higher or lower energy depending on the chirp. This effect is reduced by intensity averaging, but it is still a measurable effect.

*Supported by the Chemical Sciences, Geosciences, and Biosciences Division, Office of Basic Energy Science, Office of Science, US Department of Energy.

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Authors

  • M. Zohrabi

    • J.R. Macdonald Laboratory, Department of Physics, Kansas State University
    • J. R. Macdonald Laboratory, Department of Physics, Kansas State University

  • Jianjun Hua

    • J.R. Macdonald Laboratory, Department of Physics, Kansas State University

  • J. McKenna

    • J.R. Macdonald Laboratory, Department of Physics, Kansas State University
    • J. R. Macdonald Laboratory, Department of Physics, Kansas State University

  • A. Max Sayler

    • J.R. Macdonald Laboratory, Department of Physics, Kansas State University
    • J. R. Macdonald Laboratory, Department of Physics, Kansas State University
    • Kansas State University

  • B. Gaire

    • J.R. Macdonald Laboratory, Department of Physics, Kansas State University
    • J. R. Macdonald Laboratory, Department of Physics, Kansas State University

  • Nora G. Johnson

    • J.R. Macdonald Laboratory, Department of Physics, Kansas State University
    • J. R. Macdonald Laboratory, Department of Physics, Kansas State University

  • P.Q. Wang

    • J.R. Macdonald Laboratory, Department of Physics, Kansas State University

  • Kevin Carnes

    • J.R. Macdonald Laboratory, Department of Physics, Kansas State University
    • J. R. Macdonald Laboratory, Department of Physics, Kansas State University

  • B.D. Esry

    • J. R. Macdonald Laboratory, Department of Physics, Kansas State University
    • J.R. Macdonald Laboratory, Department of Physics, Kansas State University
    • Kansas State University
    • Department of Physics, Kansas State University
    • J.R. Macdonald Laboratory, Kansas State University

  • Itzik Ben-Itzhak

    • J.R. Macdonald Laboratory, Department of Physics, Kansas State University
    • J. R. Macdonald Laboratory, Department of Physics, Kansas State University