|About this Abstract
||Materials Science & Technology 2019
||Controlled Synthesis, Processing, and Applications of Structural and Functional Nanomaterials
||Light-matter Interactions in Nanocrystalline Ceramics Near the Mie Scattering Limit
||James Wollmershauser, Serge Nakhmanson, John W Drazin, Boris N Feigelson, Lukasz Kuna, Edward Gorzkowski
|On-Site Speaker (Planned)
Optical non-cubic (i.e., birefringent) ceramics with grain sizes around 40 nanometers sit at the edge of two regimes of light-matter interactions for visible light wavelengths. In ceramics with grain sizes smaller ~40 nanometers, the grain boundary periodicity is <10x smaller than the wavelength of incident light and Mie scattering can be neglected. However, for ceramics with grain sizes greater than ~40 nanometers, light-matter interactions can be described by a Rayleigh-Gans-Debye model developed by Apetz and van Bruggen. In this work, nanocrystalline alpha-alumina and ysz ceramics were synthesized via Environmentally Controlled Pressure Assisted Sintering (EC-PAS) and light-matter interactions were evaluated by characterizing the transmitted wave front quality and degree of diffuse scattering. Additionally a new mesoscale model will be discussed that may describe the observed behavior better than the traditional models.
||Definite: At-meeting proceedings