Abstract
The study of the interaction of ultrashort laser pulses with solids has raised some important questions concerning the nature of the transformations occurring at the material surface in the presence of very strong levels of electronic excitation. Even though the presence of electronic excitation-induced metastable transient phases has been demonstrated in several materials on irradiation with femtosecond laser pulses,1'5 the role of electronic excitation in permanent phase transitions is still not fully understood, and different nonthermal effects have been invoked to explain permanent structural changes induced in amorphous Si and Ge on nanosecond and picosecond laser pulse irradiation.6'7 The aim of the work presented here is to elucidate whether the high electronic excitation induced by irradiation with subnanosecond laser pulses can enhance the crystallization process of an amorphous phase.
© 1996 Optical Society of America
PDF ArticleMore Like This
M.C. Morilla, C.N. Afonso, J. Solis, and J. Siegel.
CMJ3 The European Conference on Lasers and Electro-Optics (CLEO/Europe) 1996
Q.F. Wang, L.P. Shi, Z.B. Wang, B. Lan, K.J. Yi, M.H. Hong, and T.C Chong
TuE25 Optical Data Storage (ODS) 2003
Masayuki Fujita, Yusaku Izawa, Takayoshi Norimatsu, Noriaki Miyanaga, and Yasukazu Izawa
CM_P21 The European Conference on Lasers and Electro-Optics (CLEO/Europe) 2009