Transition between mechanisms of laser-induced field-free molecular orientation
Abstrak
The transition between two distinct mechanisms for the laser-induced field-free orientation of CO molecules is observed via measurements of orientation revival times and subsequent comparison to theoretical calculations. In the first mechanism, which we find responsible for the orientation of CO up to peak intensities of 8 x 10^13 W/cm^2, the molecules are impulsively oriented through the hyperpolarizability interaction. At higher intensities, asymmetric depletion through orientation-selective ionization is the dominant orienting mechanism. In addition to the clear identification of the two regimes of orientation, we propose that careful measurements of the onset of the orientation depletion mechanism as a function of the laser intensity will provide a relatively simple route to calibrate absolute rates of non-perturbative strong-field molecular ionization.
Topik & Kata Kunci
Penulis (9)
Irina Znakovskaya
Michael Spanner
Sankar De
Hui Li
Dipanwita Ray
Paul Corkum
Igor V. Litvinyuk
C. Lewis Cocke
Matthias F. Kling
Akses Cepat
- Tahun Terbit
- 2013
- Bahasa
- en
- Sumber Database
- arXiv
- Akses
- Open Access ✓