Optical Properties of GST Nanoparticles Fabricated By Laser Printing Technique

Laser printing technique offers an effective, fast process and free of lithography for fabricating spherical nanoparticles. on the other hand, GeSbTe (GST) compound has attracted a lot of attention in the field of reconfigurable metamaterials. Here, we use this method to fabricate the spherical GST nanoparticles. Transmission electron microscopy (TEM) analysis of the GST nanoparticles shows a broad size distribution of spherical nanoparticles which makes them resonant in wide spectral range. We also study the nonlinear optical properties of the nanoparticles demonstrating a sharp increase of second harmonic generation (SHG) at the transition point from amorphous to crystalline states.