Novel Materials and Devices from Self-Assembled Periodic Structures
Abstract
The purpose of this work is to develop highly optically nonlinear CdS quantum dot-SiO2 sphere composites useful for optical switching. The concept is to use these spheres in a BCC array formed from crystalline colloidal arrays. The spheres would normally be refractive index matched to the medium and light would freely transmit. At high light intensities the refractive index of the nonlinear spheres would diverge from the medium and the array would optically pop up to diffract away the high intensity light. The device would act as an optical limiter. Last year's report announced the development of a successful synthesis of these SiO2-CdS sphere composites. During this report period, we refined our process in order to obtain more homogenous and monodisperse products. We have also extended this synthesis to produce several new materials.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 1994
- Accession Number
- ADA286499
Entities
People
- Sanford A Asher
Organizations
- University of Pittsburgh