Semiconductor-oxide nanocomposites on the basis of porous semiconductors

Abstract

Over the last years, there has been considerable interest in optical properties of rare-earth-ion doped nanocrystals dispersed in a transparent medium as potential optoelectronic materials. This issue becomes especially important in connection with the growing interest in the development of random lasers. Most of the random lasers elaborated to date are based on powders, microspheres, nanocrystallite clusters, polycrystalline films, and disordered organic materials. However, these lasers are not suitable for integration with other optical or electronic functions. Nanocomposite materials prepared on the basis of porous semiconductor templates are more perspective in this regard. We propose to use porous semiconductor based nanocomposites for the formation of random laser cavities. Recently we developed technological methods for the preparation of semiconductor-oxide nanocomposites with controlled composition and oxide-phases content.