Sub-picosecond laser-driven shocks in metals and energetic materials
Abstract
A high-energy sub-picosecond laser was used to both drive a shock into thin film targets and spectroscopically interrogate the shocked material. Targets were thin films of molecular materials coated or grown upon thin vapor-plated metal films on thin glass substrates, or neat metal films on thin glass substrates. The non-linear optical interaction of the sub-picosecond shock-driving laser with the thin glass substrate produced surprisingly flat shock waves. Sub-picosecond time-resolved frequency- and spatial-domain interferometries were used to characterize the shock wave as it transits from the thin metal film into the thin molecular material layer; the effect of the pressure-dependent complex index of refraction of the shocked metal will be presented. Ultrafast vibrational spectroscopic interrogation of shocked molecular materials (example: glycidyl azide polymer thin films) will be discussed. Progress in preparation of, as well as the need for, uniform, well oriented, thin energetic material layers appropriate to such highly time-resolved methods will be discussed.
- Publication:
-
APS Shock Compression of Condensed Matter Meeting Abstracts
- Pub Date:
- June 2001
- Bibcode:
- 2001APS..SHK.F4003M