Short time-scale energy transport in light-emitting porous silicon
Mary Cynthia Hipwell, University of California, Berkeley (Degree granting institution)
Porous silicon exhibits unique characteristics, such as quantum confinement, a high surface-to-volume ratio, and surface and structural disorder, which lead to enhanced optical properties. These features can dramatically impact the short time-scale energy transport in the material, as characteristic carrier lifetimes are approached and thermal diffusion lengths approach disorder lengths. Short time-scale energy transport is important in many ultrafast applications of porous silicon, such as optical switching and laser-materials processing. The objective of this work is to examine the thermal impact of quantum confinement, surface properties, and disorder on short time-scale energy absorption and transport in porous silicon
Thesis, Dissertation, English, 1996