Article,
Ground state vibrational wave-packet and recovery dynamics studied by time-resolved CARS and pump-CARS spectroscopy
Journal of Raman Spectroscopy, 37 (1-3): 397--403 (2006)
DOI: 10.1002/jrs.1441
Abstract
Recent experiments on gaseous iodine and β-carotene are analyzed within a wave-packet description of femtosecond-time resolved four-wave mixing spectroscopy. Employing the same formalism, two different experimental setups, both established in the Kiefer group, are treated. In a transient four-wave-mixing (FWM) experiment, where two pulses interact simultaneously with the system, the interaction with a third time-delayed pulse leads to light emission reflecting ground state vibrational dynamics in I2. On the other hand, delaying a FWM-pulse sequence with respect to a single pump pulse interacting with β-carotene yields a signal that is directly proportional to the population of a selected nuclear eigenstate in the electronic ground state. Thus, within this setup, it is possible to monitor ground-state re-population dynamics mode specifically. Copyright © 2006 John Wiley & Sons, Ltd.
