Formation of amorphous sapphire by a femtosecond laser pulse induced micro-explosion

We report on structural characterization of void-structures created by a micro-explosion at the locus of a tightly focused femtosecond laser pulse inside the crystalline phase of Al 2O 3 ( R3 c space group). The transmission electron microscopy (TEM), micro-X-ray diffraction (XRD) analysis, and Rama...

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Published inApplied surface science Vol. 255; no. 24; pp. 9745 - 9749
Main Authors Mizeikis, Vygantas, Kimura, Shigeru, Surovtsev, Nikolay V., Jarutis, Vygandas, Saito, Akira, Misawa, Hiroaki, Juodkazis, Saulius
Format Journal Article
LanguageEnglish
Published Elsevier B.V 30.09.2009
Subjects
Laser nano-fabrication
Phase-transitions
Sapphire
Shock waves
Synchrotron X-rays
Shock waves
Sapphire
81.07.−b
Phase-transitions
61.46.−w
Laser nano-fabrication
Synchrotron X-rays
91.60.Gf
91.60.Hg
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Summary:We report on structural characterization of void-structures created by a micro-explosion at the locus of a tightly focused femtosecond laser pulse inside the crystalline phase of Al 2O 3 ( R3 c space group). The transmission electron microscopy (TEM), micro-X-ray diffraction (XRD) analysis, and Raman scattering revealed a presence of strongly structurally modified amorphous regions around the void-structures. We discuss issues of achieving the required resolution for structural characterization and assignment of newly formed phases of nano-crystallites by TEM, XRD, and Raman scattering from micro-volumes of modified materials enclosed inside the bulk of the host phase.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0169-4332
1873-5584
DOI:10.1016/j.apsusc.2009.04.063