Direct near-field optical investigation of phase-change medium in blue-ray recordable and erasable disk

Jen You Chu*, Shen Chuan Lo, Shu Chen Chen, You-Chia Chang, Juen Kai Wang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

The authors report a direct examination of recorded marks in blue-ray recordable and erasable disks with scattering-type scanning near-field optical microscopy. The optical contrasts of the crystalline and amorphous regions of the phase-change layer match with the prediction based on their optical constants. The determined spatial optical variation in the recorded marks reflects the intensity profile of the recording laser beam. The identified nanometer-sized optical features are shown to correspond to 10 nm-sized crystalline domains within the amorphous recorded marks. The revealed near-field signatures show a potential influence on the carrier-to-noise ratio of this optical storage medium.

Original languageEnglish
Article number103105
JournalApplied Physics Letters
Volume95
Issue number10
DOIs
StatePublished - 18 Sep 2009

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