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Indexed by:期刊论文

Date of Publication:2009-02-01

Journal:PHYSICAL REVIEW A

Included Journals:SCIE、EI、Scopus

Volume:79

Issue:2

ISSN No.:1050-2947

Key Words:molecular electronic states; molecule-photon collisions; resonant states; rotational-vibrational states; stimulated Raman scattering; two-photon processes

Abstract:We explore theoretically the rovibrational dynamics of stimulated Raman adiabatic passage (STIRAP) in molecular electronic states including both the rotational and the vibrational degrees of freedom, with the LiH molecule as an example. By using a pure rovibrational state as initial state, we find that, under the condition of two-photon resonance, an efficient rovibrational population transfer can be achieved via STIRAP in molecular electronic states and the desired target state can be selected by adjusting laser-pulse parameters. Besides the interested rovibrational states, however, some unwanted rovibrational states may affect population transfer process, especially while the two-photon detuning is taken into account. By inspecting the evolution process of wave packet, we can easily search these unwanted rovibrational states and study their influences. Moreover, the effect of rotational temperature on the population transfer process is discussed using thermal mixed state as initial state.