Crystallization studies on phase-change optical recording media by use of a two-dimensional periodic mark array

Xiaodong Xun, James K. Erwin, Warren Bletscher, Jinhan Choi, Senta Kallenbach, Masud Mansuripur

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We present the results of crystallization studies in thin-film samples of amorphous and crystalline GexSbyTez. The experiments, conducted at moderately elevated temperatures, are based on measurements of the first-order diffraction efficiency from a two-dimensional periodic array of recorded marks. When the samples are slowly heated above room temperature, changes in the efficiencies of various diffracted orders give information about the on-going crystallization process within the sample. Two different compositions of the GeSbTe alloy are used in these experiments. Measurements on Ge2Sb2.3Te5 films show crystallization dominated by nucleation. For the Sb-rich eutectic composition Ge-(SbTe), crystallization is found to be dominated by growth from crystalline boundaries. We also show that crystalline marks written by relatively high-power laser pulses are different in their optical properties from the regions crystallized by slow heating of the sample to moderate temperatures.

Original languageEnglish (US)
Pages (from-to)6535-6547
Number of pages13
JournalApplied Optics
Volume40
Issue number35
StatePublished - Dec 10 2001

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Optical recording
Crystallization
recording
crystallization
Crystalline materials
Diffraction efficiency
High power lasers
Chemical analysis
eutectics
Temperature
high power lasers
Eutectics
Laser pulses
Nucleation
Optical properties
Experiments
nucleation
Heating
optical properties
Thin films

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Crystallization studies on phase-change optical recording media by use of a two-dimensional periodic mark array. / Xun, Xiaodong; Erwin, James K.; Bletscher, Warren; Choi, Jinhan; Kallenbach, Senta; Mansuripur, Masud.

In: Applied Optics, Vol. 40, No. 35, 10.12.2001, p. 6535-6547.

Research output: Contribution to journalArticle

Xun, X, Erwin, JK, Bletscher, W, Choi, J, Kallenbach, S & Mansuripur, M 2001, 'Crystallization studies on phase-change optical recording media by use of a two-dimensional periodic mark array', Applied Optics, vol. 40, no. 35, pp. 6535-6547.
Xun, Xiaodong ; Erwin, James K. ; Bletscher, Warren ; Choi, Jinhan ; Kallenbach, Senta ; Mansuripur, Masud. / Crystallization studies on phase-change optical recording media by use of a two-dimensional periodic mark array. In: Applied Optics. 2001 ; Vol. 40, No. 35. pp. 6535-6547.
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