Impact of solidification dynamics on crystal properties of silicon molten by a nanosecond laser pulse

In this study, we use pump-probe microscopy to examine the melting and solidification dynamics of silicon during and after a UV laser pulse with a duration of 30 ns . Below the ablation threshold, we observe lateral melt front contraction velocities of up to 600 ms - 1 . The peak velocities spatiall...

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Bibliographic Details
Published inApplied physics. A, Materials science & processing Vol. 124; no. 3; pp. 1 - 5
Main Authors Meyer, Fabian, Büchler, Andreas, Brand, Andreas A., Dasa, Manoj K., Nekarda, Jan F., Preu, Ralf
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 01.03.2018
Springer Nature B.V
Subjects
Applied physics
Characterization and Evaluation of Materials
COLA2017
Condensed Matter Physics
Lasers
Machines
Manufacturing
Materials science
Nanotechnology
Optical and Electronic Materials
Physics
Physics and Astronomy
Processes
Silicon
Solidification
Surfaces and Interfaces
Thin Films
Ultraviolet lasers
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Summary:In this study, we use pump-probe microscopy to examine the melting and solidification dynamics of silicon during and after a UV laser pulse with a duration of 30 ns . Below the ablation threshold, we observe lateral melt front contraction velocities of up to 600 ms - 1 . The peak velocities spatially coincide with a ring of lower crystallinity within the formerly molten area, as we show with spatially resolved Raman spectroscopy.
ISSN:0947-8396
1432-0630
DOI:10.1007/s00339-018-1682-6