Observation of anisotropic diffusion of light in compacted granular porous materials.
By analyzing spatio-temporal characteristics of short optical pulses diffusively transmitted through compacted granular materials, we reveal that powder compaction can give rise to strongly anisotropic light diffusion. Our disclosure represents a revision of the understanding of optics of powder compacts. Routes to material characterization and investigation of compression-induced structural anisotropy are opened, and the falsification of isotropic models have implications for quantitative spectroscopy of powder compacts (e.g., pharmaceutical tablets).
Department of Physics, Lund University, P.O. Box 118, 221 00 Lund, Sweden. erik.alerstam@fysik.lth.se
Erik
E
Alerstam
Tomas
T
Svensson
D003102:Colloids / Q000737:chemistry*; D019245:Compressive Strength; D003198:Computer Simulation; D008027:Light; D008956:Models, Chemical; D008958:Models, Molecular; D016062:Porosity; D012031:Refractometry / Q000379:methods*; D012542:Scattering, Radiation
D003102:Colloids