Spontaneous Raman Scattering with Picosecond Pulses

摘要: The first informations about vibrational relaxation processes in liquids were obtained by observing the time evolution of spontaneous anti-Stokes Raman scattering from states with a non equilibrium population1. Due to small raman cross sections and envolved constants these experiment are rather inefficient require picosecond resolution. With increasing performance ultrashort laser systems detection setups it is now possible use whole potential this technique especially monitor complete (anti-Stokes) spectra sufficient resolution2. This allows observe all active which carry transient excess population. Exciting one single mode via resonant IR absorption complex pathways can be identified analysed.