Another transfer channel for shock energy flowing into intra-molecular: the coherent transfer channel

Abstract

In this paper, we have proposed that there is another transfer channel for shock energy flowing into to intra-molecular vibration mode. During this energy transfer process, these higher frequency vibrations would gradually possess a coherence at the direction of shock wave. Namely, these optical phonons could be coherent after shock wave compressed. Based on the probe light can be scattered by the coherent optical phonons, a series of light scattering experiments at varying detection angles were performed to explore the existing evidence of coherent optical phonon in shocked materials. No matter the incident angle is 6.2° or 15.7°, the Signal intensity ratio γs and the line width Γ of compressed vibration were both showed peak value around the corresponding phase matching angle which was attributed to the contribution of coherent optical phonons. Taken together, these experimental results demonstrated the existence of new proposed shock energy transfer channel, that coherent transfer channel, and open new perspectives in the molecular dissociation channel research in shocked materials.