Quantum beats induced by partially coherent laser sources

✍ Scribed by Xue-Pei Jiang; Paul Brumer

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 598 KB
• Volume: 180
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(91)87144-z

✦ Synopsis

We consider the effect of the partial coherence ofthe excitation light source on the characteristics of quantum beats in isolated molecules. Using a variant of a phase diffusion model we show that the laser incoherence can induce two distinctly different types of behavior, depending upon the relative location of the pulse carrier frequency and the excited molecular eigenstates, as well as upon the Franck-Condon factors for excitation. The approach is applied to analyze both transform limited and partially coherent excitation in the C( 'B1) state in SOz, providing previously unavailable spectroscopic parameters. *' For a comprehensive review see ref. [ 81. R2 Indeed such incoherences have been advantageously utilized to obtain coherent information. See ref.