Abstract:
The photoluminescence, infrared absorption, and Raman spectra of amorphous multilayered nanoperiodic $a$-SiO$_x$/ZrO$_2$ structures produced by vacuum evaporation and then annealed at different temperatures (500–1100$^\circ$C) are studied. It is established that the evolution of the optical properties with increasing annealing temperature is controlled by sequential transformation of Si clusters formed in the SiO$_x$ layers from nonphase inclusions to amorphous clusters and then to nanocrystals. The finally formed nanocrystals are limited in sizes by the thickness of the initial SiO$_x$ layers and by chemical reactions with ZrO$_2$.