Computation of multiphoton IR spectra of small molecules: Application to CO

J. V. Moloney, F. H.M. Faisal

Research output: Contribution to journalArticlepeer-review

34 Scopus citations


A non-perturbative theoretical method has been generalised to compute rovibrational multiphoton excitation probabilities in small molecules. The practicability of the method is illustrated by direct computation for CO. Novel non-linear features emerge in the absorption spectrum when the power broadening of individual rovibrational lines becomes comparable to the rotational constant of the molecule. The results also establish that over-simplified N-level models should be treated with caution.

Original languageEnglish (US)
Article number013
Pages (from-to)2829-2840
Number of pages12
JournalJournal of Physics B: Atomic and Molecular Physics
Issue number17
StatePublished - Dec 1 1979
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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