Vol. 26, issue 08, article # 6

Abstract:

Within the density matrix framework, we obtained an expression for the transient third-order susceptibility and relating refractive index induced by stimulated Raman scattering of femtosecond pulse on molecular rotational transitions. It is explicitly shown that the nuclear sub-system response to the pulse field is anisotropic and delayed in time. Calculated average values of the refractive index n₂ for molecular nitrogen (2°10^-19 cm²/W) and oxygen (4°10^-19 cm²/W) agree with those available in literature.

Keywords:

femtosecond pulses, nonresonant interaction, molecules

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