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Title

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

Author(s)

Mizeikis, Vygantas;  Kimura, Shigeru;  Surovtsev, Nikolay V.;  Jarutis, Vygandas;  Saito, Akira;  Misawa, Hiroaki;  Juodkazis, Saulius

Abstract

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 Al2O3 (R3c 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.

Publication type

Journal article

Source

Applied Surface Science: proceedings of the Sixth International Conference on Photo-Excited Processes and Applications (6-ICPEPA), Sapporo, Japan, 09-12 September 2008, Vol. 255, no. 24 (Sep 2009), pp. 9745-9749

Publication year

2009

FOR Code(s)

0204 Condensed Matter Physics;  0912 Materials Engineering

Keyword(s)

Phase-transitions;  Laser nano-fabrication;  Shock waves;  Sapphire;  Synchrotron X-rays

Publisher

Elsevier B.V.

ISSN

0169-4332

Publisher URL

http://dx.doi.org/10.1016/j.apsusc.2009.04.063

Copyright

Copyright © 2009 Elsevier B.V. The accepted manuscript is reproduced in accordance with the copyright policy of the publisher.

Full text

Peer reviewed