Raman electron scattering stimulated

D. M. Neumark We are interested in generating coherent vibrational motion in negative ions, which typically do not have bound excited electronic states. Does your Impulsive Stimulated Raman Scattering (ISRS) scheme work if the excited state is not bound ... 

Consider a time-resolved, electronically nonresonant CARS spectrum from a molecular liquid. In the CARS process, the laser pump pulses create a linear combination (that is the inteimolecular rovibrational coherence) of Raman active rovibrational transitions between molecules at position rr and r in the mixture. This stimulated Raman scattering process is carried out by two-coincident laser pulsesfl, II) with central frequenciesfwave vectors) C0i(k ) and (Oiiikii). By applying the third pulse with C0 (kni) to the liquid after time delay t, the time dependence of the inteimolecular rovibrational coherence is detected through the measurement of the intensity of the scattered photon with kj... 

When a femtosecond laser pulse passes through nearly any medium, coherent vibrational excitation (in general, initiation of coherent wavepacket propagation) is likely [33, 34]. One- or two-photon absorption of a visible or ultraviolet pulse into an electronic excited state can result in phase-coherent motion in the excited-state potential [35]. Impulsive stimulated Raman scattering can initiate phase-coherent vibrational motion in the electronic... 

Besides these hyperpolarizabilities type of electronic nonlinearities, liquid crystals have also been shown to exhibit Raman and Brillouin nonlinearities. Stimulated Raman and Brillouin scatterings have been... 

C.S. Wang, The stimulated Raman process, in Quantum Electronics A Treatise, vol. 1, ed. by H. Rabin, C.L. Tang (Academic Press, New York, 1975), Chap. 7 M. Mayer, Applications of stimulated Raman scattering. Appl. Phys. 11, 209 (1976)... 

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