Direct precipitation of CdS nanocrystals in glass by ultrafast laser pulses

摘要

In this study, we investigated the structure of microdomains directly laser-written in the bulk of glass and containing CdS nanoparticles by transmission electron microscopy. The CdS nanocrystals have a multidisperse size distribution while quantum dots with a minimal size of 3-4 nm are registered near the edge of a microdomains. The size of CdS nanocrystals sweepingly increases up to-340 nm from the periphery to the center of the laser-written microdomain. It has been found that microdomains possess laser polarization-sensitive optical properties providing opportunities for the development of advanced optical data encoding and security tagging.