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Two-color study of Autler–Townes doublet splitting and ac Stark shift in multiphoton ionization spectra of CO

J. Chem. Phys. 100, 6122 (1994); doi:10.1063/1.467075

Issue Date: 1 May 1994

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Su Xu, Guohe Sha, Bo Jiang, Weizhong Sun, Xiangling Chen, and Cunhao Zhang
State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
By using a two-color scheme, we have given a closer scrutiny to the Autler–Townes doublet splitting and ac Stark shift in the 2+2-photon ionization spectra of CO Ion A 1(v[script ']=4)<--X 1Sigma+(v[script `]=0) transition in the presence of another strong laser field, which is resonant with the transition C 1Sigma+(v[script ']=0)<--A 1Pi(v[script ']=4)P10 branch. All the observations of ac Stark shift/broadening as a function of the perturbing light frequency and its spatial homogeneity strongly support our previous theoretical interpretation for one-color studies. A qualitative interpretation based on the dressed state theory, which is being quantified, for the Autler–Townes splitting as well as the ac Stark effect has been given. In particular, the magnitude of the Autler–Townes splitting is found to vary with the square root of the perturbing light intensity, in line with the dressed state theory. The Journal of Chemical Physics is copyrighted by The American Institute of Physics.
History: Received 9 November 1993; accepted 11 January 1994
Permalink: http://link.aip.org/link/?JCPSA6/100/6122/1
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KEYWORDS and PACS

Keywords
PACS
  • 33.80.Rv
    Molecular spectra and interactions of molecules with photons Photon interactions with molecules Multiphoton ionization and excitation to highly excited states (e.g., Rydberg states)
  • 33.55.Be
    Molecular spectra and interactions of molecules with photons Optical activity and dichroism; magnetooptical and electrooptical spectra Zeeman and Stark effects
  • YEAR: 1994

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PUBLICATION DATA

ISSN:
0021-9606 (print)   1089-7690 (online)
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REFERENCES (8)
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