Ultralow-fluence single-shot optical crystalline-to-amorphous phase transition in Ge-Sb-Te nanoparticles

Nanoscale
Barbara CasarinMarco Malvestuto

Abstract

Here we demonstrate that the 0-dimensional confinement of Ge2Sb2Te5 results in a drastic reduction of the minimum critical fluence required for optical-induced amorphization when compared to the thin-film cases. We show that by using single-shot laser pulses, the investigated nanoparticles display a crystalline-to-amorphous transition, satisfying a mandatory requirement of a bit-memory element. These unprecedented results open a viable route to boost energy efficient phase-change processes.

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Citations

Jan 28, 2020·Nanoscale·Bo ZhangTomas Wagner
Nov 6, 2018·Physical Review Letters·Yasuyuki SanariHideki Hirori

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Methods Mentioned

BETA
optical microscopy
X-ray

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