Dynamic theory of crystallization in Ge2Sb2.3Te5 phase-change optical recording media

Ewan M. Wright, Pramod K. Khulbe, Masud Mansuripur

Research output: Contribution to journalArticle

24 Scopus citations

Abstract

We develop a theory of the crystallization dynamics of Ge2Sb2.3Te5 thin films that shows good qualitative agreement with experimental reflectivity results from a two-laser static tester. The theory is adapted from the nucleation theory of liquid droplets from supersaturated vapor and elucidates the physics underlying the amorphous-to-crystalline phase transformation under short-pulse excitation. In particular, the theory provides a physical picture in which crystalline islands, or basic embryos, are thermally activated in the amorphous material and subsequently grow as stable nuclei are formed.

Original languageEnglish (US)
Pages (from-to)6695-6701
Number of pages7
JournalApplied optics
Volume39
Issue number35
DOIs
StatePublished - Dec 10 2000

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering

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