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

Journal Article · Mon Mar 10 00:00:00 EDT 2008 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.2894506· OSTI ID:21120573

Kudryashov, Sergey I; Zvorykin, Vladimir D; Ionin, Andrei A ^[1]; Mizeikis, Vygantas; Juodkazis, Saulius; Misawa, Hiroaki ^[2]

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1. P.N. Lebedev Physical Institute, Russian Academy of Sciences, 119991 Moscow (Russian Federation)
2. Research Institute for Electronic Science, Hokkaido University, Sapporo 001-0021 (Japan)

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/cm{sup 3}. The acoustic measurement enables real-time in situ monitoring and revealing of basic mechanisms of ionization and filamentation in bulk dielectrics.

• OSTI ID: 21120573
• Journal Information: Applied Physics Letters, Vol. 92, Issue 10; Other Information: DOI: 10.1063/1.2894506; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ACOUSTIC MEASUREMENTS
ACOUSTIC MONITORING
DIELECTRIC MATERIALS
ENERGY DENSITY
GLASS
IONIZATION
LASERS
PLASMA
PLASMA DENSITY
PLASMA PRESSURE
PLASMA PRODUCTION
PULSES
SILICA