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Title

Acoustic monitoring of microplasma formation and filamentation of tightly focused femtosecond laser pulses in silica glass

Author(s)

Kudryashov, Sergey I.;  Zvorykin, Vladimir D.;  Ionin, Andrei A.;  Mizeikis, Vygantas;  Juodkazis, Saulius;  Misawa, Hiroaki

Abstract

Contact acoustic technique has been employed to perform spatially resolved in situ detection of microplasma formation and filamentation of tightly focused femtosecond laser pulses with supercritical pulse powers in bulk dielectrics, via corresponding acoustic emission. Investigation of acoustic generation mechanisms related to the plasma formation and filamentation effects reveals the critical character of the opaque microplasma and provides estimates of its gigapascal-level pressures and energy densities of a few kJ cm3. The acoustic measurement enables real-time in situ monitoring and revealing of basic mechanisms of ionization and filamentation in bulk dielectrics.

Publication type

Journal article

Source

Applied Physics Letters, Vol. 92, no. 10 (Mar 2008), paper no. 101916

Publication year

2008

FOR Code(s)

01 Mathematical Sciences;  02 Physical Sciences;  09 Engineering

Keyword(s)

Acoustic monitoring;  Femtosecond laser pulses;  Filamentation;  Microplasma formation;  Silica glass

Publisher

American Institute of Physics

ISSN

0003-6951

Publisher URL

http://dx.doi.org/10.1063/1.2894506

Copyright

Copyright © 2008 American Institute of Physics. Published version of this paper reproduced here in accordance with the copyright policy of the publisher.

Additional information

The authors acknowledge support from the Grant-in-Aid from the Ministry of Education, Science, Sports, and Culture of Japan (grant no. 19360322).

Full text

Peer reviewed