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

Appl. Phys. Lett. 95, 103105 (2009); doi:10.1063/1.3222901

Published 9 September 2009

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Jen-You Chu,1 Shen-Chuan Lo,1 Shu-Chen Chen,1 You-Chia Chang,1 and Juen-Kai Wang2
1Material and Chemical Research Laboratories, Industrial Technology Research Institute, Hsinchu 310, Taiwan
2Center for Condensed Matter Sciences, National Taiwan University and Institute of Atomic Molecular Sciences, Academia Sinica, Taipei 106, Taiwan
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. ©2009 American Institute of Physics
History: Received 20 May 2009; accepted 15 August 2009; published 9 September 2009
Permalink: http://link.aip.org/link/?APPLAB/95/103105/1
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KEYWORDS and PACS

Keywords
PACS
  • 42.79.Vb
    Optical storage systems, optical disks
  • YEAR: 2009

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ISSN:
0003-6951 (print)   1077-3118 (online)
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