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Optica Publishing Group
  • Chinese Optics Letters
  • Vol. 13,
  • Issue 12,
  • pp. 121601-
  • (2015)

Phase-selective fluorescence of doped Ge2Sb2Te5 phase-change memory thin films

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Abstract

In this Letter, new concepts of fluorescence phase-change materials and fluorescence phase-change multilevel recording are proposed. High-contrast fluorescence between the amorphous and crystalline states is achieved in nickel- or bismuth-doped Ge2Sb2Te5 phase-change memory thin films. Opposite phase-selective fluorescence effects are observed when different doping ions are used. The fluorescence intensity is sensitive to the crystallization degree of the films. This characteristic can be applied in reconfigurable multi-state memory and other logic devices. It also has likely applications in display and data visualization.

© 2015 Chinese Laser Press

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