1.7 Gbit/in.2 gray-scale continuous-phase-change femtosecond image storage

• Main Authors: Craig, Chris, Zheludev, Nikolay I., MacDonald, K. F., Wang, Q., Maddock, J., Rogers, E. T. F., Roy, T., Hewak, D. W.
• Other Authors: School of Physical and Mathematical Sciences
• Format: Article
• Language: English
• Published: 2014
• Subjects: DRNTU::Science::Physics
• Online Access: https://hdl.handle.net/10356/103927; http://hdl.handle.net/10220/19381
• Institution: Nanyang Technological University

We demonstrate high-density, multi-level crystallization of a Ge2Sb2Te5 thin film using tightly focused femtosecond laser pulses. The submicron spots with 8 distinct data storage states are written on a 1.08 μm square grid. The significant change in reflectivity of every specific state of crystalliz...