Amorphization induced by subnanosecond laser pulses in phase-change optical recording media
We have investigated the dynamics of amorphization induced in phase-change optical recording media by focused laser pulses of subnanosecond duration. We initiated localized amorphism by using a focused laser beam to melt the phase-change material and completed the change by rapid cooling by means of...
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| Published in | Applied optics (2004) Vol. 43; no. 22; p. 4367 |
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| Main Authors | , |
| Format | Journal Article |
| Language | English |
| Published |
United States
01.08.2004
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| Online Access | Get more information |
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| Summary: | We have investigated the dynamics of amorphization induced in phase-change optical recording media by focused laser pulses of subnanosecond duration. We initiated localized amorphism by using a focused laser beam to melt the phase-change material and completed the change by rapid cooling by means of thermal diffusion. These studies were conducted by use of real-time reflectivity measurements with a pump-and-probe technique in which both pump and probe pulses had a duration of approximately 510 ps. Our transient-reflectivity measurements indicate that the process that leads to amorphism has three distinct stages, namely, rapid melting, solidification, and slow relaxation. |
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| ISSN: | 1559-128X |
| DOI: | 10.1364/ao.43.004367 |