Ultrafast laser-induced integrated property-structure modulation of Ge₂Sb₂Te₅ for multifunction and multilevel rewritable optical recording.

ABSTRACT: In this paper, we report an approach for tuning the surface morphology and phase of Ge₂Sb₂Te₅ (GST) by using an ultrafast laser in a one-step process. Four surface micro/nanostructures with specific phase states were sequentially formed by changing the pulse energy: the modified ripple structure, the completely crystallized structure, the ablated nanodots, and the ablated ripple structure. A high correlation existed between the surface micro/nanostructures and their property. Through integrated property-structure modulation, multifunctional optical recording could be achieved by using modified ripples with specific crystallized phase states. The geometric grating morphology caused by the volume shrinkage effect during crystallization enabled modified ripple

SUBMITTER: Zhao K 

PROVIDER: S-EPMC11501491 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature