Frequency-domain observation of the ultrafast inertial response of the optical Kerr effect in CS2

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Abstract
Time‐domain experiments using femtosecond pulses have recently revealed the inertial aspect of the nuclear‐orientation component of the optical Kerr effect in carbon disulfide. We present frequency‐domain measurements, performed with the tunable‐laser‐induced grating technique, which also demonstrate the need to incorporate inertial behavior in models of the nuclear‐orientation contribution to this ultrafast response. No previously suggested model, however, yields a fit to our data that passes standard goodness‐of‐fit tests at an acceptable level.