Molecular dynamics of liquid benzene via femtosecond pulses laser excitation

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Abstract
We analyse the complex response of liquid benzene to the applied 45 fs FHWM optical pulses by using a polarization sensitive transient grating technique. An electronic contribution to the nonlinear polarization is distinguished from three other processes which, we demonstrate, originate in polarizability modifications associated to molecular motions. Additionally, we present evidence that orientation of C6H6 molecules towards the applied optical field is not instantaneous. The time it takes for the molecules to orient along the incident field is measured