Formation and Modeling Nano Sized Levels of the Self-Organized Structures in the Non-Crystalline Thin Films Ge-As-Te(S,Se) Systems

Abstract

A model of thermal instability and the formation of self-organized structures under the action of continuous infrared radiation of a CO2-laser on amorphous condensates of systems Ge-As-Te(S,Se) applied to quartz or mica substrates is proposed, and its analysis is based on experimental studies. It is shown that the uniform distribution of the temperature field along the beam section at the power density of the radiation P>Pc (Pc= (1.8-8.5)W/cm2) becomes unstable and a radial-ring structure with a spatially inhomogeneous profile of the temperature field is formed. Dependence of the threshold density of the power of infrared radiation on the duration of exposure is established. A bifurcation diagram in a plane {power(P),temperature(T)} that describes the singular behavior of optical density, depending on the duration of exposure to radiation is constructed.