Shock compression of materials leads to wide number of physical and chemical changes. In our group we use novel techniques for spectroscopically studying changes in materials under nanosecond shock impact. We use nanosecond time-resolved laser spectroscopy in combination with bulk shock measurement technique such as photonic Doppler velocimetry to provide ultrafast measurements of materials under shock. Laser-driven flyer plates are launched by laser ablation of thin Al foils are used to produce planar compression wave in a target with a pressure between ~1-10 GPa. We are interesting in: (1) studying behavior of polymers films under high-rate pressure in nanosecond time scale. To probe the dynamical evolution of polymers structure we use emission from dye molecules embedded in polymers. (2) investigation dyes photophysics under shock compression to provide a roadmap for designing improved emission probes that would respond more accurately to ultrafast pressure transients. (3) developing new emission sensors for shock compression science based on nanoparticles that can be easily incorporated into any polymer, polymer composite, or particulate material to study their pressure behavior.

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