Abstract
The study of the optical properties of materials at high pressure is a
novel subject of research, and can be related to the knowledge of
equation of state. The optical properties of materials are related to
the electronic and structural properties of materials. Therefore,
changes of the material optical properties can be used to detect phase
transitions. The capability to measure optical properties and to detect
phase transitions during a dynamic process is of great importance.
Ellipsometry measures the change in the polarization of a probe beam
reflected from a surface. From the change in polarization, the complex
index of refraction can be extracted. Dynamic ellipsometry measurement
system allows to measure all four stokes parameters and to derived the
time dependent complex index of refraction. The dynamic ellipsometry was
integrated with the gas gun facility for optical properties measurements
under planer impact. The optical properties of 1020 steel and tin
targets under different impact pressure were measured. The unique
characteristics and changes of the optical properties of metals due to
impact and heating experiments will be presented.
| Original language | English |
|---|---|
| Title of host publication | American Physical Society, 17th Biennial International Conference of the APS Topical Group on Shock Compression of Condensed Matter, June 26-July 1, 2011 |
| State | Published - 1 Jun 2011 |