The Local Vibrational Mode Theory and Its Place in the Vibrational Spectroscopy Arena
- Award ID(s):
- 2102461
- PAR ID:
- 10430198
- Date Published:
- Journal Name:
- The Journal of Physical Chemistry A
- Volume:
- 126
- Issue:
- 47
- ISSN:
- 1089-5639
- Page Range / eLocation ID:
- 8781 to 8798
- Format(s):
- Medium: X
- Sponsoring Org:
- National Science Foundation
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Abstract Short intense laser pulses are routinely used to induce rotational wave packet dynamics of molecules. Ro-vibrational wave packet dynamics has been explored comparatively infrequently, focusing predominantly on extremely light and rigid molecules such as H , H2and D2. This work presents quantum mechanical calculations that account for the rotationalandthe vibrational degrees of freedom for a heavier and rather floppy diatomic molecule, namely the neon dimer. For pumping by a strong and short non-resonant pump pulse, we identify several phenomena that depend critically on the vibrational (i.e. radial) degree of freedom. Our calculations show (i) fingerprints of the radial dynamics in the alignment signal; (ii) laser-kick induced dissociative dynamics on very short time scales (ejection of highly structured ‘jets’); and (iii) tunneling dynamics that signifies the existence of resonance states, which are supported by the effective potential curves for selected finite relative angular momenta. Our theory predictions can be explored by existing state-of-the-art experiments.more » « less
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