Nonresonant multi-pulse selective spectroscopy of interaction-induced responses in liquids using optical Kerr effect
Kazan E.K. Zavoisky Physical-Technical Institute, Kazan, Russia
An ultrafast selective spectroscopic measurements of vibrational-rotational dynamics of molecules in liquids were implemented using optical Kerr effect (OKE) detection under multi-pulse nonresonant xcitation. Introducing additional excitation pulses and creating either constructive or destructive interference of corresponding wave packets allows one to isolate the responses of certain molecular motions (orientational,inter-orintramolecular)in OKE signal. As a result,the parameters of molecular rotations and coherent vibrations could be evaluated with significantly greater precision compared to conventional single pulse excitation scenario.