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Proceedings Paper

Phase Transformation of Ge1Sb4Te7 Films Induced by Single Femtosecond Pulse
Author(s): Qinfang Wang; Luping Shi; Sumei Huang; Xiangshui Miao; Tow Chong Chong
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Paper Abstract

Phase transformations of 100nm Ge1Sb4Te7 films induced by single 130fs pulse at 800nm have been investigated with time-resolved microscope. With an average fluence of 30mJ/cm2, a reflective intensity increase was observed within 1ps in 100nm as-deposited Ge1Sb4Te7 films after excitation by intense femtosecond pulse, which was consistent to an electronically induced non-thermal phase transformation. XRD measurement confirmed that single femtosecond pulse could induce crystalline marks in 100nm as-deposited Ge1Sb4Te7 films. Our results indicated that single femtosecond pulse could trigger both crystalline and amorphous phase in 100nm Ge1Sb4Te7 films. The fluence for crystallization was higher than that for amorphization.

Paper Details

Date Published: 9 September 2004
PDF: 8 pages
Proc. SPIE 5380, Optical Data Storage 2004, (9 September 2004); doi: 10.1117/12.557108
Show Author Affiliations
Qinfang Wang, National Univ. of Singapore (Singapore)
Data Storage Institute (Singapore)
Luping Shi, Data Storage Institute (Singapore)
Sumei Huang, Data Storage Institute (Singapore)
Xiangshui Miao, Data Storage Institute (Singapore)
Tow Chong Chong, National Univ. of Sinagpore (Singapore)
Data Storage Institute (Singapore)

Published in SPIE Proceedings Vol. 5380:
Optical Data Storage 2004
B. V. K. Vijaya Kumar; Hiromichi Kobori, Editor(s)

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